This product made my bed more comfy, only problem is I need to order deep pocket sheets...
It fits well, stays on very well, my only problem with this mattress pad is when I washed it before using it, I followed the instructions of having it cold wash and low temp drying, but one of the mattress pads coverings on the bottom side of the pad, did melt, because of the dryer.  I used the bigger dryer on low temp, and still it melted on one spot.  Other than that, they are super comfortable, keen you warm when it's cold, just have to see if it will make me hotter in the summer.  Only time will tell.

Pros: plump, well fitting, stays on the bed, a good buy, cheap price.
Cons: underside is a bit thin, did melt