PC Apex have a new review up of the Kingwin Mach1 600watt Modular Power Supply.

In true PC Apex fashion, I've voided the warranty to give you a good look at the internals. The heatsinks are not as large as others I've seen, but they are heavy duty. The soldered connections were done very solid with no visual defects noted. The fans are connected via removable connectors rather than soldered directly to the PCB which is nice for those who would like to use this power supply in a custom PC but change the fans for a different color scheme. Build quality was superb and all components were positioned well for optimum cooling.

Kingwin 600W Mach 1 PSU Review