This booster has helped to bring some more airflow to the room farthest from our furnace. At low to medium speeds, the 92mm fans are reasonably quiet, but there is a slight hissing/rattling audible from the ball bearings. A high speeds, the fans are fairly loud, both from the air turbulence and motor noise. Installation is straightforward, provided that your register cutout is at least 9.8\" x 3.9\" in size. You'll need an AC outlet nearby for the power adapter, which supplies 12V to the booster. The cord is long, but it would've been nice if it was white, instead of black, to blend in better visually. The controls are easy enough to use after reading the instructions. You can set the booster to run either continuously or automatically when heating/cooling cycles are detected. The display turns off after a while, so it won't light up the room and keep you awake at night. All in all, I'm satisfied with the booster. It could be quieter but does improve the heating/cooling in our room. Of course, every HVAC system/situation is different, so results may vary.