I got 3 of them. Straight from petco. Don't really need quarentine because the parasites and stuff should die in the converesion process (FW and SW ich completely different etc.) but I am not 100% on that. At any rate they are supposedly great algae eaters and I believe it. I've never had algae problems but once I went w/o water changes for 2 weeks and the only spot in my tank with hair algae was the output of my powerhead where it and my snails oud't reach, and the thing was fighting the current like heck to get it.
I have 2 of them in a tank with no CUC except a cerith and a hermit and there is only film algae in one spot, on a piece of PVC. I have heard they can be agressive but have trouble believing it. They can also mate, give birth and be raised in the aquarium. I have 4 growing babies right now! And about 3-5 doing well in my sump with periodic feeding!