its covered in the powerfc FAQ, but the main issue with the FCON is no local tuners
if you can find one, its probably the only one in the state, so whatever service you get, you have no choice but to go there and pay their price. with other locally supported ecu's you can choose your tuner and price, and if its crap, find another and away you go
any ECU can make any power and be driveable etc
so dont expect one ECU to make power than another