We wanted to get peps but our LFS told us that they'd have lunch at our cleaner's expense.... We've got a 34g so maybe in bigger tanks it's not such a worry...?
I added peppermint shrimp to an existing cleaner and coral banded -- and these guys were TINY (ordered them in)
Some of them were so tiny I put them in a sump for a few months (pain getting out) but neither the coral banded or cleaner shrimp bothered them.