The PSU is a hit and miss issue. Some people are fine. Some have a thermister on the input side go pop. Those with the skills replace the thermistor. The root issue is that the V2 heatbed draws close to the 480w output of the psu at startup. Seems to be a combination of heatbed resistance and where the thermister sits in is spec.

There is now a V3 heatbed with a reduced power draw. I have not seen anyone post the actual draw yet.