Summary: When I get more money, I'm intending on buying a few more. Also, I bought them for $14. I don't know whether or not their list price of $22 would be a good deal. May just want to go with Noctua in that price range.
Pros: Very high static pressure. Great for radiators and for front intakes. Incredibly low noise. I'm using it on 12V right now and I can't hear a thing. If you can, there are 7V and 5V adaptors that come with it. That strange air channeling thing works like a charm. Have it pointed right at my CPU heatsink. Lowers temps by a few degrees. Comes with rubber fan mounts. UV reactive.
Summary: Overall a great product for intake fans and radiator fans. high static pressure and i noticed a 2-3 degree drops because of it from my previous fans on my radiator. Definitely getting another one when i upgrade to a 360 rad.
Pros: Quiet and performs well. blue fins look nice and has a really nice braided black sleeve. comes with a molex to 5v-7v-12v adapter.
Summary: System: CoolerMaster Storm Scout Case MSI 790XT-G45 AMD 955 X 4 3.2Ghz overclocked to 3.8Ghz Corsair Dominator DDR2 PC8500 4X1G Corsair H50 Cpu Cooler Sapphire HD5750 X 2 in Crossfire WD Raptor 74g for OS WD Green 1Tb for files
Pros: VERY High static pressure, which gives this fan a definite edge over the competition. I have it installed on a Corsair H50, only using this fan for exhaust. Consistently, the temps are 33C at idle and around 50C at full load with an AMD 955 at 3.8ghz. Stock is 3.2ghz on this processor. Recovery time with this fan after gaming or running stress tests is pretty quick, despite the fact that this is the only fan that I am using to cool the radiator. I love this fan!!!
Summary: Before you try and pass judgement on this fan for having a poor cfm/dba ratio or any of that nonsense you love to do (Protip: You cannot judge a fan on specs alone), understand this: This is not a HERP DERP HIGH AIRFLOW fan. This is, well, an air penetrator. It was designed with air channeling in mind, and it has extremely high air pressure.
Summary: Using this fan in a "pull" configuration on top of my CPU heatsink in my Silverstone FT02 case allows me to remove the pre-attached 120 mm case fan above directly above it. With this case fan removed, I could feel no air coming the hole when using my old cpu fan. I had to reach down and feel the air spewing out in a sideways direction only recirculated the heat from the heatsink.