I personally know "Collierm", and have know him for a very long time.
I can confirm for anybody in doubt this head unit worked perfectly fine, infact he sold his amp and sub part of this install to my brother-in-law.
I believe the buyer has brough this item on ebay to save cash (obviously) and then gone on to install it himself, again to save cash. To be honest i dont think anybody pay's to get a stero installed anymore (and i bet he has no reciept for the installers work). I suspect he has cross wired the unit and blew it himself.