I have been searching for a comfortable mattress for a cheap price, and when I came across this mattress on Amazon, it seemed like a perfect match for me. Cheap and comfortable.
It opened up and expanded within only a few hours, and I was able to sleep on it the first night as I didn't notice a smell (I read reviews that the smeel was horrible, however, I could only get a hint of a smell when I decided to put my nose directly on it. Still not bad.)
Now this is where I give my real input. I say I'm pretty average on the scale of sensitivity to mattress comfort. My boyfriend is even less sensitive, being able to sleep on almost anything. After night one, we both looked at eachother and said "Too firm." We both woke with sore backs. It was interesting because when I sat on it, I sank in and thought "Oh, this'll be nice!" But when you lie down, it's the same weight over a larger area, meaning you don't sink in nearly as much (barely any actually). I came prepared with two 1.5" foam toppers just incase, and I am still using them now. I find the mattress perfectly comfortable after I put these memory foam toppers on. So I do say that for the price, this mattress is just "OK" and mainly because I have these toppers.
By the way, the 8" mattress is plenty big enough. The 10" would be too large for my sheets (especially with the foam toppers barely fitting now).