Pros: At the highest speed of 2,000 rpm, the fan is still fairly quiet. The build quality is solid. The fans are reliable and keep the system running cool.
Cons: The wires can be very confusing, and there is no manual that comes with the product. Fortunately, there is a manual online which is a little helpful, but pictures showing a diagram would be ideal.
Summary: I mainly chose this fan because I wasn't sure how much CFM I wanted or how loud a large CFM would be, and because my motherboard at the time didn't have the capability to control fan speed. The highest setting is pretty loud, as can be expected. Medium is much quieter and still moves more air than any case fan I've ever owned before.
Pros: This fan can move a ton of air, and is about as quiet as a fan moving a ton of air can be.
Summary: Pros: Blue, Bright, Easy install, switchable speeds, quite Cons: None so far Other Thoughts: I do like that they come with both a 3 PIN PWM system board connector and the ability to attach to the Power supply using a standard peripheral connector. However when connected tot he system board, it will always read top RPM's no matter where you have the manual switch set to. It is nice to be able to always run them at middle speed and still have no heat issues.
Summary: The fan looks nice till you try to install it. The 4 screws that come with the fan are all rusty or were not threaded properly. had to to go out to buy the 4 fan screws a fresh. Once, I was able to add the fan in the desktop case - I realized it was too noisy and air that it was pulling out was too low. And worst of all till I reached that point with it's short return period, it could not be returned back too. Total waste of time and money.
Summary: Love this fan! I use it as the 80mm exhaust fan on my micro atx gaming computer. Very bright, and might be a little too bright if used for a fan on the front of the case that was not covered. But for being on the back of the case it is perfect. It lights up the entire inside of the case with a beautiful blue light. I also have the 120mm model hooked up to the intake fan on the front of my case mounted to a water cooling radiator.