I got one of these not too long ago. I've yet to come across a negative review, and several more have been written since I first got the unit. My experience has been entirely positive:
* steady rails
* fairly quiet (the 80mm fan almost never ramps up, and it can be controlled by a rheobus or left on auto)
* modular design, sleeved cables, right-angle connectors
* no problems with overclocking (so far 400-500 MHz oc, limited by my finicky E6 venice)
* fast response by sunbeam's tech support whenever I've had a question
on the downside, a few minor complaints:
* the included fan controller/temp display is pretty useless (but harmless if you do use it)
* the second PCI-e cable (for SLI rigs) is actually a standard molex with an adapter
* the diagram of the modular cable connections in the manual I received was wrong. That was annoying at first but easily resolved.
* no voltage control of individual rails
Oh yeah, the warranty is actually TWO years - not as good as Antec or some others, but still ok in my book. It only gets reduced to one year if you break a seal to connect the 120mm fan to a fan controller.