I initially ordered without the track pack and then decided that was crazy and added it. But it does depend on what you want to do with the car, performance wise.
Specifically, and I'm talking about off-road use, if you are more attracted to the drag strip than the track, the track pack "might" not be the best idea. Something something Torsen hard launch premature wear. Otherwise, I think it's a good value (even if it's slightly overbuilt for daily driving)
Living in the desert, I found the radiator, oil cooler and 5w50 appealing as well. When comparing these options to aftermarket, remember that you get the factory warranty with the Track Pack.
I was worried about the ride, but it's extremely comfortable. What that tells me is it may not really be enough performance for track driving.
I was worried about the 3.73s, but they also are very streetable. After driving all three types of rear axles, I realized that they were close enough that I can't remember a difference. If you drive them back-to-back, you might. One nice thing about the track pack 3.73s is that they are painted (vs. rust).
The spare tire thing kind of sucks. If you never leave town it's no big deal, but I took a trip to Vegas and just didn't feel right without a spare. I ordered the 18" aluminum spare for the non-track pack GTs from eBay for $200. It only fits the rear, so if you get a front flat you need to install the spare on the rear and install the good rear tire onto the front.
There are some other miscellaneous items that are nice to have that aren't acknowledged by Ford. Check out
for a list.
TLDR: The only reason not to get a track pack is because you are really close on the affordability, have an automatic, convertible, or you want to drag race. If you can afford it but it's not available with your configuration, get the Brembo pack instead.