Like other posts, I was compelled to by the mattress protector to ensure mattress warranty. After initial use, saw how poorly it fit. It slides all over so I bought 4 sheet secure straps. This helped but then my fitted sheet still moved a lot on top of the protector given it's sheen materials. The protector is also tough to wash and dry. It is dripping wet even after several spin cycles. I was afraid to put it in the dryer with so much water. Now after less than 3 years, the "vinyl" layer closest to the mattress has separated from the top layer. I removed it and love how the bed feels with out the "plastic" feel and sound of the protector. Will just take my chances with a voided warranty.