Summary: Just bought this cooler to replace my cheap 3$ fan for Corsair Water Radiator. Air flow is on average but noise comes out of the case and is very annoying. It is worse than my cheap 3$ fan. Very disappointing.
Summary: I bought this fan to replace the one I broke when I stuck my finger in it (Ouch!). I'm very glad I bought this fan. It is dead quiet, I can't even tell it's running and it keeps the computer cooler than the stock fan it replaced. Great buy.
Summary: Installed two of these in the front of my Antec 280 case. Noticed a big improvement in both System, GPU and CPU temperatures. Compared to the stock 3 120mm fans, these 2 contribute significantly more noise. To get an idea, my computer sounds like a computer now. Not obnoxious but noticeable. In contrast, before it was almost hard to tell if the computer was on. I guess you can't have the best of both worlds. If you care more about performance and cost, get these.
Summary: I got many of these fans, installed 3 of them in my PBX server which has been working 24 hours since almost a year with no issues at all. It is a very high quality fan and I recommend it for any high efficiency environment.
Summary: I bought 3 of these fans to go on and off during the day for my large 150qt humidor. They haven't added any heat to the inside and run very quiet. I tend to need to open the humidor to make sure they are running. They produce a lot of wind and make easy work of spreading the humidity around the humidor. Easy install and have lasted over a year now.