I really liked margaritas for rock and glass but they don't do well in the warmer temps of a reef. I have a lot of nassarius to stir up the substrate and they do a good job and I have a bunch of astreas but they tend to favor the glass.
I can see where the snails cleaned the glass but honestly I think the number you would need to keep your glass clean would make it hard to see through the tank. I never bothered with turbos because people tend to complain about them knocking over stuff. I've never seen any of my snails knock over corals, hermits on the other hand can be frustrating with smaller frags and such.
If you want to keep the glass clean I recommend a magfloat, doesn't get much easier than that. I do think snails provide a beneficial service to the reef, especially in areas you don't see. I have tons of little baby snails in mine (I'm not sure what kind, they look like they might be baby astreas but the shells are still round). I picked off 11 of them off my maxijet when I was doing the sureflow mod a couple days ago and in the morning they are all over the top of the rocks.