We LOVE this bed!

It is a cool (temperature) bed and it took a little getting used to, but we also came from a heated waterbed to this. We are in Florida, so the coolness is appreciated. We added the 3" topper for comfort (4" was too soft). Without the topper it was a medium firmness. Our king size has the massage/vibration and adjustable options in the bed frame. We bought this right before I found out I was pregnant and the massage feature was awesome! The adjustable (think Craftmatic) feature was helpful for my swollen ankles-I could use the zero gravity position to take the weight off of them. My husband is 6'5" and can just about stretch out all of the way. With the topper the mattress was 15" deep. We had a little bit of a problem finding flannel sheets (we love the softness), but were able to find an amazing set from LL Bean. It is VERY heavy. Keep in mind it is a solid piece of rubber. It takes a MINIMUM of two strong men to move it; three is really what you need. Making small adjustments to line it up on the bed frame is difficult because of the weight. You can sit on the edges without sliding off (like foam or soft side waterbeds). You won't feel someone get in and out of it while you are sleeping (which I do a lot of because of our newborn).