It is okay. I am a shifter, I switch positions all night due to health issues. I find this mattress uncomfortable when flat. I tend to have the head raised slightly to stay comfortable all night. The adjustable base is very nice and quiet. I had the first generation adjustable base and it still works. But, when I bought a new mattress, I decided to get a new base too. So glad I did. It is smoother and more user friendly then the original.