These fans are outstanding. Quiet and high CFM. I'm an overclocker, so air flow is important to me, but at the same time nobody want's to listen to a hair drier.
Anti vibration pads built into the frame and shrink wrapped pigtail are a really nice touch, all for under 10 bucks. You can't beat this. FWIW, I'm replacing Scythe fans that cost me twice as much with these.