I’m not joking when I say this is the MOST comfortable mattress I have ever slept on…ever. I’m a side sleeper mostly, but I can get comfortable in any sleeping position on this Beautyrest Black. The back pain I’ve been experiencing the last few years upon waking up every morning, gone. My husband who sleeps warm, has been sleeping much cooler since we made the switch. Be warned if you ever need to move it, the mattress is a beast, weighing in around 180lbs. Speaking of size, this mattress is very high, almost 17”. My sheets are deep pocket and say they fit up to 16”.  Thankfully they fit the mattress and haven’t worked their way off yet. But beware, you may need new linens.