I actually changed mine. And did it without taking off the bumper. If you're going to have it off anyway it should be a breeze. It's fairly easy to do. Someone did a write up on it that I followed.
http://www.mustang6g.com/forums/showthread.php?t=12855
It may just be me being biased but I cannot see any flaws with the hood scoop. The weather has been crap the last few days but I'll try to get some better shots. The drilling (to me at least) was a pain. But more so, getting the template laid down took a little time as well because it just...