I have no experience with that mattress (or with memory foam), but before buying a different mattress, would you want to try adding either a soft topper -- soft latex, soft memory foam, featherbed, or polyfill (like the Cuddlebed) -- or an electric heated mattress pad? (Or both?) 

Costco offers a variety of toppers, and I see on their Web site that they have a heated mattress pad on sale now.

Some sort of wool topper or pad might also help you retain heat.

Sooooooo, I decided to check out Tempurpedics "warranty" and guess what? Just as suspected.

Here is why, copied right from their website. Highlights I found in bold.

90 Day Tryout

Here’s how it works:

• Buy a Tempur-Pedic® mattress from us, on our website or by phone.
• We'll deliver your mattress and set it up in your home.
• Sleep on our new mattress for 30 nights to get used to the amazing comfort and support it offers.
• If you're not happy in the first 90 days after your purchase, call us. Our Customer Service staff will work with you to answer your questions and resolve your concerns.
• If we can't find a way to make you happy, we'll take the mattress back and reimburse your purchase price, less the initial shipping costs.

This tells me that you have to buy directly from them and if you don't like it, call them and their staff will try and convince you to keep the mattress. If you refuse, they will take it back as long as you pay them the "shipping and handling" fees. You lose the tax, no matter what.

So, in further reading, there is this..........

90 Night Tryout details

• Our 90 Night Tryout is exclusive to Tempur-Pedic, and covers mattresses purchased direct from us, on our website or by phone. Tempur-Pedic mattresses purchased from retail stores are not covered by the Tempur-Pedic 90 Night Tryout.
• The 90 Night Tryout covers the mattress plus foundation. Ergo adjustable bases, bed frames, pillows, cushions, linens and accessories do not qualify.
• Return shipping fees may apply if you took advantage of a free shipping offer. Shipping fees are based on mattress weight, and generally range from $200 to $325.

Pretty cut and dry. If you buy from ANY retail store, there is NO 90 day trial, period. No matter how much BS a store tells you. If a store "offers" it they are full of sh!t and you are at their mercy to honor what they tell you.

If you buy it from TP directly, you can return it for a cost "generally" in the $200-$325 range. King size of course is more, probably much more. Oh, and if you purchased an adjustable foundation, or pillows, etc, you are stuck with them, period. NO returns.
 

I had a feeling it was all hype and obviously, their 90 day trial is just that. Unless of course you want to pay full retail (without all the extra stuff a store would throw in) AND you want to throw away upwards of $400 if you don't like it before the trial period ends. And be stuck with an adjustable base (if you bought one) that is now useless without a foam bed.

The bed does NOT sleep hot or cold. That is not a problem. The issue is that the bed itself changes with the temp.

I thought about a topper, but that is defeating the purpose of the mattress in the first place. I do have a topper from our previous bed that I may try just for kicks, but in no way are we pleased with the Novaform on its own.

The bed does NOT sleep hot or cold. That is not a problem. The issue is that the bed itself changes with the temp.

I thought about a topper, but that is defeating the purpose of the mattress in the first place. I do have a topper from our previous bed that I may try just for kicks, but in no way are we pleased with the Novaform on its own.

You stated the bed is firm all the time and goes to firmer when cold.  Does the bed feel good in the best of temperature?  I doubt I'd like it given that 'firm foam' underneath the memory foam.

First off, any mattress by Sleep Innovations and Novaform is found NO where in any major chain retail bed store around here.  Tells me something.  If they can't get the bed into a major store, it likely kinda sucks.

Manicinl's keeps saying they're going to start carrying iComforts.  Good luck with that.  Tempurpedic is going to kick iComfort's butt.

I think the Novaform is so firm because it is only 2.5" memory foam over 2.5" firm regular support foam just underneath.  Sounds like that support foam is screwing up the feel of the mattress.

I think Sleep Innovations / iComfort (Serta) / Novaform are quite familiar with each other. 

Ever tried an iComfort genius?    it's kind of a brick to me.  It's 2.75" gel memory foam over a 2" firm support foam over 6" core.  sounds just about like your mattress.  I've tried it in store, its too firm, I don't like it.

Off top of my head, I can't think of one TP model that has a 'firm support' foam sandwiched between a core and memory foam top. 

Mattress feels OK, but still a bit too firm in warmer weather. Obviously, there is no way to try the bed out in Costco and the reason we bought it is due to the liberal return policy. Didn't think we were going to need it after the first week or so, but now we will take advantage of it.

You also said that Sleep Innovations is not in any chain store near you, but if the store has the Serta iComfort, they absolutely have Sleep Innovations in the store.

I would imagine that you may be correct about the middle core being the root cause of the problem. I would REALLY like to try out the TP, but the "no store has the 90 day trial" thing has REALLY turned me off. Why does every store you walk in (I remember them when I lived in the Northeast) that carries TP, boldy have the signs posted? To me, that is a huge scam. As I said, TP freely admits the stores don't have it, and I surely would not trust a stores word. If they will put it in writing, I may then take a chance, until then its not going to happen.

Here's a description of the Costco deluxe 12" Novaform mattress -

'The top layer is our 2.5" premium memory foam, for a balanced combination of cradling comfort and gentle support – with the revolutionary addition of NutraFresh™ treatment, for lasting freshness and no "new foam smell."  The 2.5" middle layer is made of deeply sculpted premium foam, for dramatically improved air circulation and firm support. And the 7"  bottom layer is made of premium base foam which adds stability and therapeutic support.'

Ok, so there's only 2.5" of memory foam, total in the mattress.  That's not much.  And it's Sleep Innovations memory foam which is NOT Tempurpedic memory foam.

Then there's a 2.5" layer of regular foam that provides 'firm support'.  I think that's the problem.  Just a bit of memory foam, then a firm support layer just underneath.  Sounds like an iComfort genius which always felt too firm to me in the store.   Don't think I'd like this Novaform mattress either.

I'll see if I could pick out a better looking king foam mattress on Costco ....

It seems all of the Novaform mattresses have 2.5" gel memory foam over some type of 2 ish inches of support foam or 'wave foam', then a 7" core.

At least the $999 11" Hybrid Bliss has 2" combined memory foam over 2" medium latex over the 7" core.  That should give a little softer feel than the 2.5" gel foam over the 'firm layer' that's in your basic Novaform.

---------------------------------------

Are you saying the stores in NE had '90 day trial' TP signs posted yet they didn't offer refunds when buying from store?  I'm not sure what the TP scam is your speaking of.  Scam because they have big ad signs in store?? 

Tempurpedic is a BIG advertiser.  Easy to say they are the biggest advertising bed company today.  The rep explained that Sealy, Simmons and Serta are still much bigger than Tempurpedic now.  The don't need to advertise at 6pm on primetime TV.  But, Tempurpedic believes in their products and they obviously spend tons of money on advertising.

Every store has a sign or neon signs.  They are not shy about their products.  Mine is worth the money I spent on it.  After what I've been through the last five months, I'm happy to have spent $1450 + tax for a twin XL Cloud set.  I could have spent $899 for an iComfort insight set from Sears, got a cheesy box spring with 2.75" gel memory foam over 6" core foam and no air flow channel to vent air, just a promise that gel foam magically dissipates heat better.  

Funny, I just posted another thread about Sleep Science and the Hybrid Bliss. Trying to find out exactly who they are.

As for the signs in the stores. What I mean is that every store up North that carried TP, had big signs advertising the 90 day trial. Well, as TP plainly concedes that is a farce, who is telling fibs? I would say the local chain stores. I am not saying TP is trying to "take" customers at all. I AM saying that their advertising is HIGHLY misleading at bes and the fact that the chain stores play along just makes it worse. They may very well have a great product, but when I see "liberal" use of terms, that throws up a great big red flag.

Mattress feels OK, but still a bit too firm in warmer weather.