I bought this because I was looking for a quality mattress pad that would fit our 18" deep king mattress and not slip off (which had been a problem with a cheaper brand purchased).  Just put it on the bed last night and couldn't believe the noise - it is advertised as "water-proof" which I didn't care about one way or another, but I didn't realize that meant it is basically plastic-lined.  It's like sleeping on a plastic bag.

Pros: fits 18" deep mattress
Cons: too noisy