Summary: I bought this to replace my stock PS in my alienware R4. I got a new graphics card and it didn't have enough juice. Was a difficult install but I got it back together and it worked! No issues and appears bullet proof so far!
Pros: What drew me to this PSU was its looks and its rating. The looks didn't matter too much while I knew my power goes out quite often so the gold rating was looking pretty good! It just went through its first power outtage and my PC woke up without a scratch!
Summary: The unit powers a 550 watt load very well. You can't beat 850 watts and 80+ Gold at this price. Modular cables (all but the 24-pin were flat) are also a plus. The only cons I had with the unit were during installation.