So, we got Moon Sand as a gift. The kids and I were excited--we'd heard a lot of nice things about it, after all.
It IS easy to mold and play with. And the texture IS pleasantly sand-like. Unfortunately, this also means that, like sand, it gets EVERYWHERE. It's MUCH harder to clean up than playdoh, and the baby is on a moon-sand spree through the house!
My advice? Stick with the play-doh. It's cheaper and cleaner!