I have 8 of these guys in my tank (50 Gallons), they are the best algae eater I've found (much much better then SAE's), they are great for getting rid of brown algae apparently it's their favorite type to eat. They also do a great job on the regular old green algae.
I have to agree that these fish don't get their full due, they are an interesting fish to watch when in groups, they seem quite social.