Pros: Very reliable! I just had another Antec power supply die on me, and thankfully I had this one in my HTPC running quietly, cool, and with no problems whatsoever. I also had another power supply (off brand) that is brand new around at work. The brand new power supply couldn't handle the motherboard...
Pros: When I got this, it was pretty easy to install and was as quiet as I had hoped. Decent price.
Cons: Used the media computer with this power supply relatively rarely, then the day I needed it for a party, turned it on and the bearings were going out and squealing like a banshee. I expected more life from this power supply.
Summary: As I remember, the version of this product that I received has 4 SATA connectors instead of the 2 SATA connectors shown in the specs, which is a plus. It took me more than 2 years to start using this PSU (because of one of my cases -- there is nothing wrong with the PSU).
Pros: Active PFC. 80-plus efficiency. Reliable. Quiet!
Summary: Many of the negative reviews appears to result from the fact that this is an ATX v2.0 power supply. This (and all other ATX v2+ supplies) are not appropriate for pre-Pentium 4 era systems. It doesn't supply -5V and the power distribution among voltages is for modern builds.
Pros: I got this power supply with the Antec 4480 II case. Quietest actively cooled PSU I've owned. Clean voltages.
Cons: Only 380W, but it's 380 honest watts. 34A @ 12V (17+17) is more than you'll get from many cheaper PSUs whose power output is rated much higher than it.
Summary: I'm considering upgrading to a quad core, and I'm going to initially try it out on this PSU. If it can't handle it, I'll go up to the 500w version, but I'm definitely sticking with this product line!
Pros: Rock solid. I've been running this for 2 years. I've currently got the following hooked into it: AMD 4200+, 4GB ram, ATI HD2600, 1 (SATA) BD drive, 1 (IDE) DVD drive, 2 x (SATA) WD Green 1TB, 1 x (SATA) WD Black 1TB, 2x (IDE) SEAGATE 500GB, 1 x (IDE) Seagate 400GB. As Keanu would say, "Whoa."
Cons: Nothing. Not only is it stable, but it's also very quiet.