Walmart 4" Spa Sensation memory foam topper

Does anyone have experience with this mattress topper? We are thinking of buying one for the queen size bed. However, the R Pod queen is 60 x 72 and the topper is 60 x 80. Has anyone cut theirs to size?

We needed to replace the foam in some cushions and I bought sheets of 5" foam.  My first cut, although carefully made, was very ragged.  I did some Internet research and the best method of cutting the foam is to use an electric knife (either regular or for slicing bread) sprayed with Pam or a similar product.  It worked great and would work even better on a mattress topper.

Bob