First, it was very easy to put on the bed. Second, it clings to the mattress so it doesn't move when you do. Third, is washes and dries perfectly to fit back on the bed so I do not have any lumps or pulls in the material. Better than the cover that came with the bed when it was new.
This mattress pad brand was needed as explained to keep the mattress warranty in tact against stains. We opted for the more and very expensive "plush" variety. It is anything but "plush", but probably will work against spill stains.
Great mattress pad. Expensive but worth the price. I have the same one on another bed so got one for my new bed. Now, if the new bed was as good as the cover I'd be in good shape.