This is my third Serta mattress in 4 years. I think I have finally found a decent model. The jubilance is one of the newer iseries (not icomfort) which combines memory foam and a coil system. There are several models in the iseries line, but only the top three make extensive use of memory foam and avoid the cheaper polyfoams. These top three iseries models are also easily identified in the lineup as they have only one stripe on the side. The cheaper iseries have two stripes.

After 60 days with the bed, I am sleeping well on this model. It feels solid and comfortable. Temperature is fine. Odor was not too bad.

I think for a mass market mattress this model has good materials and construction. It has a neural comfort level (not too soft, not to firm) and works well for side or back sleepers.

I spent a ALOT of money on this mattress (Serta Perctect Day) and within 3 years, sags so bad we both have back problems. Called Serta for warranty, and even thought the springs are shot and you sag to the box spring, the fabric pulls tight when you are off, so there is no "visible sagging" and not covered under warranty. Beware the 20 year warranty is USELESS because the fabric is designed to be tight even thought he mattress is shot.