Small increase in induction noise but the car drives a lot happier. The stock intakes suck in comparison. I get around 1.5mpg better on the highway and around 0.5-0.7mpg better in the city after installing this scoop, which was surprising.
You don't actually have to remove the whole bumper for the install, just the 4 screws holding the front on the engine bay, the 4 clips in the front wheel wells (2 each side) and the 2 bolts in the front wheel wells (1 each side. Just pop the bumper off and let it hang while you install the scoop, took me about 40 minutes to figure out (I've never done this before so you can probably do it faster).