It is a very comfy mattress. The first two nights were a little different. Then after that, I slept like a baby! My daughter loved hers from the very first night.
The mattress comes with a 10-year warranty. The great thing is that they give you 100 nights to figure out if you want to keep it. If you decide it is not for you, you simply call them and they arrange for a charity to pick it up, then you receive a full refund. The hard part? Figuring out what to do with your old mattress. Mine still looked good, so I sold it on Craigslist. I had quite a few calls about it, so that was easy, too.
I have to say, bottom line, I am quite happy with my new mattress!