I love love love love my tempurpedic.
Had it for about 5 years now and every time I'm on a trip I can't wait to get home and sleep in my bed.
I have a bad lower back and can go to bed with it sore and wake up feeling awesome... it's literally like an 5hr chiropractor appointment. Awesome.
It
is a little hotter in the summer, buy that can be fixed with some lighter weight bedding during the warmer months.
As discussed sex is perfectly fine on it. LOL.