Like the "Maglev" technology built into this fan. Noise is well within acceptable range. Don't underestimate the air output on this fan. I incorporated it into a 30 amp DC power supply, tested it after install, and couldn't ask for more output from a fan this size to keep the heatsink cooled off. Way to go Cooler Guys!
Fans always work, quick shipping, good prices. Never had issues with the coolerguys.