Pros: Quiet

Cons: Installation is difficult: you have to be careful about installing because the screwholes are not threaded and the plastic that the screws go into will twist and potentially tear the rubber

Overall Review: Overall they are okay for my use, but the first one I tried to install tore the plastic right out of the rubber, but luckily It was for the top of my case, so I could hide the broken end in the back of my case. It was also only that fan that was super tight for the screws, the other 3 fans I got were easier to install and did not break

Pros: They move a noticeable amount of air through my rad Look good In my case

Cons: Not really too much of a con, but are a little noisy with my case door open; closed they are fine