So, now it's a contest between the HR foam and the latex mattress!

I just slept on my friend's new latex mattress (International Bedding--Origins soy latex mattress). Here are the specs:

Base: (2) 3 1/2 inch convoluted soy support layers--1.8 lb density (28-32 ILD)

Top: (1) latex comfort layer (22 ILD)
(1) layer convoluted soy (22 ILD)

It felt a little too soft at first, but then i grew to like it, and i slept better than i had in a while. It's not a bargain, but cheaper than other latex mattresses at $1000 for a king. The *motion transfer* was almost non-existent, too, which was a great plus.

Wondering: Is this a good mattress? Will it last and keep its shape? WHY does it have less motion transfer than other latex mattresses? Does the softness have to do with that??

Thanks for any advice! :)