I have ended up with 4 of these. I had 2 others, but sold them with a bunk bed set. I bought the first in about 2009 and have been adding ever since. This is what I like about the mattress; first, it keeps its shape. The oldest one we have still has not sunk in any. This was me and my wifes mattress for several years then we got a new one and let my daughter have the old one. I weigh about 230 and my wife about 130. We do turn our mattress every 2 months or so. The mattress would be on the firm side compared to other memory foam I have tried. When you first get in bed it takes a few minutes to relax a bit. I have back issues and this bed seems to give me better support than others I have tried. Second thing I like is these mattresses seem not to get so hot like others I tried. I am very hot natured and have always slept with a fan, whether on a memory foam or regular. I think the heat issue is kinda a personal thing, everyone will be a little different. I have tried about 3 other brands and this is the most temperature neutral I have found. Third, it comes rolled up not folded. I like this because the folded ones I tried always kept a ridge running down the middle of the bed from where the fold was. This mattress opens up flat and stays that way. As for things I don't like, I can't really think of any. This is the most durable and comfortable bed I have found-since my waveless water bed in the 90's.