This is the best topper.  I was debating on getting a whole new mattress but wasn't thrilled with the idea of spending hundreds of dollars, so I decided to try this first and wow, it's so comfortable!  When it arrived it was very misshapen and compact, but just unroll it and let itself do the rest.  Throughout the day it started to pop out on its own, I didn't try and force it.  The queen fit perfectly on the bed, and it doesn't move around.  The "fingers" mold around you while you sleep and move but when you get up they go right back to their natural shape