I was looking forward to use these sheets since the fabric is quite nice and elastic only for it to end up in such disappointment. The fact that the full-fitted ones do not fit so well our full sized mattress makes it really frustrating. While we are sleeping, it starts to slipping off and coming totally off the corners. The flat sheet also appears to be too tiny for a full-size bed. I've never had this problem with other full-sized sheet sets, so it's a little disheartening.