Have done Great, I had two of them in my Truck with over 7000watts of power RMS, with a yellow top and the stock thirteen year old 130amp Alternator and it kept the lights from dimming too bad, all things considered I think they did a great job. One of them had an issue with the LEDs for the display not working but after a little while i guess it just worked itself. in all was working fine last i Checked.

Cons: Looks are great, the smoked plastic looks great, but the Chrome is just Chrome plated plastic, they do feel kinda Cheap, But not a big deal, Cuts down on weight I guess.