Pros: These fans are absolutely quiet! I ramped up every fan in my case to test how low I could get my CPU temps and at most I heard a very very faint hum, something you wouldn't notice unless right next to it and trying to hear if it makes noise.

Cons: The fan didn't have any arrows showing airflow. Air blows out of the end with the sticker/face plate.

Other Thoughts: I would definitely recommend these to people. Quiet, help keep temps low, great price.

Pros: Absolutely dead silent fans. I bought 4 of them to put in my Define S case. They are definitely much quieter than the stock cooler currently on my processor.

Cons: Price is a little steep, but I got these on sale.

Other Thoughts: Waiting for my H110i GTX to see just how quiet my system can get.

Pros: Excellent fan: silent and pushes a lot of air. Looks and feels like a very high quality fan.

Cons: Packaging: the only way to get the fan out of the carton box that it comes in is to completely rip the packaging apart.

Pros: I bought these fans to replace my previous fans, which are so noisy. I know fractal design has great fans because I own a fractal design case, which also comes with 2 fans.

Cons: N/A

Other Thoughts: I would support Fractal Design for its fantastic fans and cases! Hope one day I can buy a PSU from them also, I've heard from others that its PSU is extremely quite also.