We love that these are the only sheets that have ever actually fit our 20" mattress. Our mattress is insanely large and very very hard to find sheets that will actually fit over it. It is a queen size mattress that we have to use a king size comforter for, and even that seems a little small. The sheets originally fit very well over the bed and stretch pretty good so that all of the corners are covered. However, if you move at all in your sleep or are tossing and turning or doing the dirty deed at all, you can expect that the sheets will pull up off of the corners. The annoying thing about these sheets is that they are pretty expensive (and the only ones of it's kind as far as we can tell) unless you get them on sale. It's also annoying that you can only find them at one place, as far as I can tell, and that's at JC Penny. It seems as though a product that has trouble staying "fit" on the mattress should not be so expensive. Also, the flat sheet does not fit nearly as well as the fitted sheet.
Saint Paul, MN