I've been sleeping on a pure memory foam mattress for the last year, and I prefer it. But it is extremely firm, and my kids get frustrated that you can't bounce on it. So, I was happy to bring this mattress into the house to see if a hybrid might be better than both pure memory foam and classic springs.It comes looking like a big white hot dog, tightly compressed in its shipping box. I put it on an old pulled out hide-a-bed and cut off its plastic casing with scissors, taking care not to nick the fabric. And it immediately started to decompress and was soon a flat, thick mattress. It smelled of chemicals so I made sure to keep the area well ventilated for several days. Also, make sure it's right side up, the springy bottom is not uncomfortable, but probably not what you want. It weighs well over 100 lbs, and is awkward once decompressed, so make sure you have it where you want it when opening.As for comfort, now that summer vacation has officially started in New Hampshire, my kids have taken to lolling around on it during their screen time, and basically acting as if they are at a hotel for the week. It's quite comfy for sitting up in bed and taking naps. Plus kids can jump on it and get some lift, unlike pure memory foam solutions. Everyone has been quite happy with it for day use.As for sleeping, I still prefer the pure cocooning experience of my memory foam mattress, although I can see where many people would prefer this somewhat softer experience, especially if they don't weigh much. Don't get me wrong, it's a perfectly nice mattress, just not my preferred one.Build quality is good with good materials throughout. I see my local furniture store sells competing hybrid models for a lot more money, and I can't imagine you will get something of a worthwhile extra build quality. The only issue is the several days of out-gassing. sent me an additional Classic Brands Pillow-Top mattress cover, and if you want an even softer experience, you might look into protecting your mattress with that too. My daughter absolutely adores it.[Update after 9 months: this mattress with the additional pillow top has turned out to be the most comfortable in the house. I get drowsy immediately on laying down. So bumping to 5 stars now that out gassing is a distant memory. Vine recently sent me a Zinus "Modern Studio" bed platform and that has been an excellent combination with this mattress. Highly recommended. ]