They are no doubt great supplies. But it really is not possible to really understand the situation without comparison to other makes. While PC Power and Cooling supplies are indeed as good as any, I have seen no evidence that they are any better than say, an OCZ Powerstream, which costs a lot less money. And to be honest, I really prefer Fortron to either, but Fortron doesn't really have many models at this juncture (AX-500A and the two Sparkle 550s are about it) that are designed for modern load configurations and none that pack the features/warranty/support of an OCZ or PC Power and Cooling.
So what I'm saying is, the only respect in which you can go wrong with a PC Power and Cooling is if you might regret at some point that you spent two dollars to do the same job you could have done by spending one on certain alternatives. In all other respects, they are admirable units.