I had one and it was great! It does add a little bit of noise when you really give it the go juice but nothing crazy just makes it sound a little more throaty. As far as install it is pretty straight forward, just take out the old and put in the new.
Biggest thing though is to disconnect the battery while you do the install. If you do not, as soon as you start it up it will throw all kinds of lights. I did that and it lit up like a christmas tree. Apparently the MAF has to reset and that is what the battery disconnect is for. That is the only thing that really sticks out in my mind as far as the install goes. Good luck!