Instruct: Classify an Amazon review as either positive or negative.
Query: FIts well and very quiet...

It is just as advertized in that its very quiet; you can't tell that it has a waterproof lining and it was quite simple to wash. I haven't had any experience with the waterproof part yet so I can't speak for that. My only really complaint, a little over the top I admit, is that the pad doesn't seem to hold its cushioning like other mattress pads might, but I freely admit that I am being picky in saying that. The quietness of the pad is the important part and it is quiet.