Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't bother...

For starters, this thing is a pain to install. I have a Volcano heatsink. After attaching the duct to the heatsink the fan is attached with long screws and tiny nuts. There's litte room to maneuver a tool or even a finger behind the fan on the short side of the duct. Getting a nut threaded onto a screw proved to be a challenge.They claim this duct reduces noise, I found the opposite to be true. While there may have been less noise caused by turbulence as they claim, the duct seemed to be vibrating, giving a whining sound. After making sure all the mounting screws were tight I tried adjusting the fan's RPM(mine is adjustable) but the vibration never went away. The whining sound was annoying enough that I didn't even take the time to test for any improvement in cooling before I removed it.