They work great in a lage community setup. In my 220gallon tank I have a striped male, a pink female, and a marbled female convict.
The other fish in the tank are an 11" male synspilum, a 7" male Escondido carpintis, a 6" male caqauatia spectabalis, and a 6" male Geophagus Red-Headed tapajos. Together I get every colro in the rainbow and a alot of movent in the tank.