[14holestogie]

I've got one I bought off E-baaa about a year and a half ago.

Pro:

No trips to the chiropractor since. It was usually a couple times a year with the old mattress.

Didn't really notice the hot in summer thing, but then again we use the air conditioning once it reaches 78 or so.

Cons:

Big. 18 inches thick, sheets are more difficult to find to fit.

Heavy. Probably goes about 150 pounds for a king-size.

Expensive (but cheaper than name brands. I think it cost me $1500 with shipping.