Do you track your car? If not...don't waste your time/money.
I was thinking about giving it a try and seeing how I like it. I've never taken a car around a race track before so the idea seems fun.
In any case, having simulated brake cooling duct grills seems silly to me so I simply wanted to make them functional with the optional kit. If it gets used someday for it's intended purpose all the better.
I'm guessing very few people with a 2013/14 GT or 2013 Boss have installed it. Maybe I'll give it a shot. $400 isn't that bad and it's fully functional. It's a justified accessory/add-on in my opinion.