Review on High-performance & Silent Cooling Solution: StarTech.com 120mm Axial Rack Muffin Fan for Server Cabinet - 115V AC Cooling, Low Noise & PC Case Fan (ACFANKIT12), Black by Nicholas Lim

The fan itself appears to be solidly, solidly built. The problem is that it didn't come with an AC adapter or mounting hardware as advertised. Other than not being able to use it, it seems pretty good. That's a great $40 paperweight. EDIT: I contacted the seller and the missing parts were sent in the mail. It took an extra week hence 4 stars but I got it and now the fan works great.