well haven't used them yet but balanced performance because they tell you straight up what needs to happen for anything you want done.
in other words they want you to know everything that is going to have to be done and taken care of!
they do not want to build your car the way they want to, but build it the way you want it to be done.

that and they are like .5 miles down the road

this is all when i have money for some serious modding = ]