I'm a expert power lifter and novice bodybuilder who needs the best support yet soft comfort. This brings both; great on the lower back and especially on the middle back not to mention my glutes. The first two nights were very difficult to adjust to the level of comfort I did not expect; i.e. I fell into the deepest sleep and woke up in the same position I crashed in. Be sure to have a good alarm clock if you decide to get this awesome mattress.