Pros: Very good air delivery at a reasonable noise level. You cannot really complain about noise if you are running a fan over 1500RPM or more. At full speed, they run very smoothly. And I suspect their ball bearing system will last many many years. How else could they offer a 3 year warranty on as case fan? They are an excellent choice if you need the extra air delivery from a 140mm fan, and also if you want a very high quality long lasting fan for use at lower speeds. You can mount them with the rubber isolation washers they give you, or just mount them as usual without them. I would not hesitate to recommend these to anybody!

Cons: Power cable length is a little shorter than some. In a large case, you may need a fan extension cable.

Overall Review: These are supplied with a fan connector to 4 pin molex adapter if you don't have a mobo connector available. They will, of course, run at full 2200RPM speed with no PWM control if powered up this way.