To start off, it's not a common PSU brand.
If ever buying a PSU, go for brands like Corsair, Antec, XFX, Seasonic etc. They have got much better, and much stabler PSUs.
Secondly, for a 500W PSU (I know that it is 520), it doesn't offer much.
Lastly, they're not too efficient. Meaning, they won't last long.