These memory foam mattress toppers are every bit as good as I hoped for.  They didn't smell like some people said, and they expanded to their true size while my husband and I went out for lunch.  Made the bed when we got home and sleeping on them is like a dream.  Would deff. recommend them.  We have a split king bed so I ordered the 2 of the twin size.  A split king is really 2 twin XL, but they didn't have that size so I ordered the twin regular, and left a little space at the top and bottom.  I put a mattress cover over them and you wouldn't even know. I love them.