This is my first airaid intake. I have dealt with other companies such as AFE for my Tundra. One thing I can say is that this is the quietest intake I have every heard. Everyone has different taste and I wouldn't mind if it was a tad louder. Installation and directions were good and installation was easier than other brands.
F150 Airaid throttle body spacer
It was very easy to install. I had to go buy shorter bolts because I have a K & N filter set up. The bolts they sent are for a stock installation. It might of given me an extra 2 or 3 mpg, but I've only run 1 tank through so far. I didn't notice any power difference. I was in it for the mileage.