Both my girlfriend and I are extremely happy with this mattress. For us, most of the odor went away after the first day although we let it sit for two more to come to its full height. The bed is firm but still comfortable. We have not experienced any sweating with this bed although perhaps that is because we purchased a very nice mattress cover at a local department store. I am so glad that we took the gamble on this mattress as we have found it to be not only an exceptional bargain but even more comfortable than the name brands sold in stores that cost so much more. Of course, I realize that everybody wants and needs something different out of a mattress. If you do not like a regular one that is firm, you might not care for this type of thing. On the other hand, my girlfriend normally prefers a soft mattress and she is crazy about this one made out of memory foam. If possible, at least try some out at a local store if not actually sleep on one before buying it. However, I wil also say this...if you are on the fence about buying this mattress or are afraid that it is not as comfortable as one you have tried in the store, for me, the gamble paid off quite handsomely.