My husband and I carefully read all of the reviews. I was having horrible back pains with our old mattress, and needed something firmer. We were torn between the 8 in. or the 10 in. mattress. But people said the 10 in. was TOO firm, and I don't like that either. So we decided on the 8. It was pure HEAVEN for the first week. We raved about it to all our friends and family. We even talked some other people into buying one. We would fall asleep instantly, sleep all through the night, and wake up in the exact same position as the one we fell asleep in hours before. All great things. And best of all, my back felt wonderful! It was pure BLISS. By week two however, we noticed the mattress was a little less firm. We thought maybe that was the worst it would get, and it was still world's better than the one we had before. And so while it was softer than we expected it should be by week two, we still raved. Although a little less enthusiastically. However, now its a month later, and it is MUSH. Its like sleeping on a massive marshmallow. My back feels like its been beaten by a baseball bat. I wake up and need tylenol immediately. Takes about 45 minutes or so for the pain to subside enough that I can start my day. Hubby puts his hand on it and it sinks in so far and low that its like it has lost all firmness. It's practically soup at this point, and we got it only 4 weeks ago. We are miserable on this thing now! What happened? Should we have gotten the 10 inch after all? People said that was too firm, but maybe that softens up after a month to something more desirable? I don't like rock-hard mattresses, and I don't like ones that are too soft either. This started out PERFECT. Not too hard, not too soft. Firm, but it let you sink in ever so slightly in all the right places. Hubby complains he wakes up now with back pains too. We are apologizing to the friends and family who we convinced to get one when ours first arrived and we were in that initial state of bliss. WARNING: This mattress STARTS OFF very firm, but after a few weeks it just goes to mush. If you like super soft mushy mattresses the consistency of a marshmallow with nearly no support, this is the one for you. Just give it a month or so. This has been our experience anyway, and we are going through the same agony now. We are thinking about saving up and just going to the mattress store and getting one of the expensive brand foam mattresses. At least they have a warranty, a if this sort of thing happens again, we can get a return, or something. We are so bummed out over this. :( But it was a blissful initial 2 weeks of VERY comfortable sleep! :) *sigh* :( We miss it!