Summary: If you want inexpensive fans that don't sound like airplane engines, these aren't bad. They're not the most quiet fans out there, but in this price range, they may be. They're not terribly loud, but you will hear them.
Pros: Long lasting Price Ambiance
Cons: The fans are a bit noisy. After 2 years, they haven't gotten any louder. You will hear a slight hum coming from these, even slightly noticeable with headphones on, if your tower is close by. Had to move my tower to the back side of my desk because my mic was picking up the hum of these fans.
Pros: Newegg had it on sale. Used it to replace an old, noisy Massc**l fan. Resulted in a large reduction of noise. Moves a lot of air out the back too. Blue light is nice. Temperatures are about the same. Comes with 4 pin molex adapter cable.
Cons: Plastic housing was just a little flimsy in comparison to last fan. Also had to reposition a couple times to get screw holes to line up. Did not come with fan screws. Attached cable was just long enough to reach far side of motherboard.
Summary: sometime in the future i'll have to replace this 80mm one with a 120mm one because it's too small for my case :/ but still moves alot of air and keeps it alot cooler!
Pros: Before i Owned this fan people would walk right by me on the streets without giving me a second look, NOW That i have this Awesome LED Fan when people see my computer they INSTANTLY know how cool I am before i even open my mouth. Girls scream my name from the rooftops when i pass them on the stre...
Cons: I made the mistake of buying an 80mm fan instead of a 120mm fan needed for my computers case and didnt notice until after it was already shipped... Still works great though.
Summary: LEDs are very bright so be warned if you don't like your entire room being illuminated by your PC. The fan isn't exactly quiet until about 50% speed and I'm not a fan of the self-threading mounting screws. Otherwise, the fan works great. Draws little power and pushes lots of air.
Summary: Bright as the sun, so if you plan on putting these in a PC/server that is on 24/7 and near where you or others sleep, I would recommend another fan. Whole room lit up from the -back- of the tower I tossed a couple of these in.