Most comfortable mattress ever! Originally bought for the price but omg I'm so glad I did!! Way better than any other mattress I've ever tried. I'm pregnant and have SPD, rib pain and sciatica. As soon as I layed down, all my pains went away. Amazing. I haven't been free of pain in months!
UPDATE: it has been 9 months and I still LOVE this mattress. I just purchased a queen size in the 8" version and can't wait!! I will be buying these for my kids too. 
I'd take this over a high end or even number bed mattress any day. I'm a stomach and side sleeper. Also a nursing mama! 5'6" normal BMI.