The slapper bats are hot, just like the other Demarini offerings. There was a misconception when the bat first came out that you shouldn't swing away with it, but that was bogus. I'd have no qualms about a righty using one. You can still find them really cheap relative to other bats. I paid $150 for a brand new CF9 slapper from a certified dealer.
The grip being wrapped the opposite way makes absolutely no difference. It's not like the original grip lasts very long anyway, so just wrap it either way when it needs replaced.