If you e-mail them with your other mods, they will give you a quote to have your computer reflashed for them as well Other than the hassle of yankin' your computer out and shipping it, their prices are very comparable.
I think in the end, you will make out money-wise. I don't have a local Dyno to get my car tuned. Nearest I can find is about 100 miles away So, I figured since I need to get the car tuned for my mods, and the gears, why not give it a shot through T&J I like not having to use a separate device when the stock comp is more than capable of doing the same thing.