Pros: Good build quality. Moves air as advertised. I purchased the fan because of the double ball bearing and the advertised number of cubic feet per minute the fan could move.

Cons: I find this fan's method of temperature control unnerving. It has its own idea how fast to run at certain temperatures, and that cannot be user-adjusted. This fan is powered via Molex connector with an extra dongle to report fan RPMs to the motherboard. I wish that dongle had been longer since the fan system fan header on the motherboard was as far from the I/O shield as was possible. The fan throttles its speed based on a thermocouple extending from the motor housing into the airflow on the exhaust side of the unit. This is not the fan to purchase if you are hoping to vary fan speed with utilities like SpeedFan.

Overall Review: This IS the fan to buy if you need to put something in VERY close proximity to a hot spot in your case. If it's a general-use case fan, beware that your computer's hardware and the fan's thermocouple can have very different ideas about how much hot air needs to be moved out of the case. Sadly, the three-egg rating I'm giving this fan may be tempered by the fact I probably didn't understand the fan's features when I bought it. I'm posting this review to tell others what I wish I had known in the first place.