i like them from the few i've seen. they hold up well but come with a heavy price tag as far as i know. i'm personally going to try excessive amperage since they have another group buy going on.
IMO the best alt you can get. others are good too dont get me wrong its just with an og alt you are less likely to get a bad surprise when your car is idling and they do what they say. if you need refferences to how good they are more than half of the "heavy hitters" i see in db drag use them especially in ss and extreme classes.