Summary: I have a case that takes 7 fans. These are the best fans I have used so far in terms of reliability and quietness over THE LONG TERM. Also, ball bearing fans can be mounted horizontally without fear of them failing, unlike sleeve bearing fans, which really only mount vertically.
Summary: It plugged right in and started working. My only complaint, and it is very minor, is the connector. My case has a LOT of fans. The fans that came with it had connectors that you could daisy chain together. I realize this was probably a custom design, which is I rate it as a minor issue.
Summary: These fans are nice and quite, and seem to be working well. Just wish the packaging included screws, AND those rubber sound dampers. Good thing I had extras because the rubber mounts aren't good in most applications.
Summary: I got this to replace an Azza case blowhole fan that was very noisy due to it being a sleeve-bearing fan. This fan is of top quality with rubber mounting, grill and ball-bearing. I had to remove the grill to save space between this and the CPU heat sink and RAM. The intake is the side with the grill so take note. Now my case is quiet. Thank you Masscool!
Summary: I have a Masscool fan for my cpu and have been pleased with its performance so when the bottom of my case was retaining heat from a SLI setup this seemed like it would work. The grill on the backside allows me to set this right next to the graphic cards on its side and the size is perfect for the 2 SLI cards. This fan is very quiet and reduced the overall temperature in the bottom of my case significantly. Great investment for the price.
Summary: Your company distributes a product that meets my needs with quality workmanship and at a fair price. This unit is quite for it's size and has been working 24-7, ever since I got it. NO hitches at all. What more can say???