I have the 750W model which I bought back in 2008 and it works flawless.
In the last 3 years, I use 2500K @ 4.6, GTX 780, 4x HDDs.
It runs for 9 years, everyday.
I am so happy about this PSU, I don't know if I go with Chieftec again or it's better to change to something else. I will change it after it dies, but it won't die.
Back in the days, there was no 80+ standard certification, it was just 80+ and this had it.
Today is just madness on PSU certification, almost they will add certification to RGB LEDs and certification by the size of the PSU.