Well the first one did not work at all. Failed to deliver power so Corsair replaced it.
The second one always ran too hot to touch and I never saw the fan come on once. Not once. So I then put a small fan blowing cool air onto it. That kept it cool to touch. I am not a fan of the hybrid fan and I guess that I am sour because I am 0 for 2 with these things.
EDIT: But what really got me was this article that says that these things are junk because they are using inferior components and claim just the opposite. I wish I had seen the article before I ordered!
http://www.overclock.net/t/1455892/why-you-might-not-want-to-buy-a-corsair-rm-psu#post_21501656