Cruz, here's the way I look at it.
First, I've not had this done to mine. Am interested in the additional HP and TQ , and shifting improvements, but two monetory issues are tied with this.
The Programmer cost, anywhere for $275-400, and the continuing use of premium fuel required by the program features to reap the programmed increases. Premium fuel is about .20/gal an additional cost every time you fill up. Using the vehicle as a daily driver for 10k miles per year (avg 20 mpg) thats an additional $100 per year. Not a significent number for most of us. (Me anyway)
To me it seems like good value for what your receiving. Reprogramming back to default standards is as easily done as initiating the program, so I assume.
Decision is yours...I'd like to hear from folks who have done this, and their oponion on the worthiness of the expense.
P/P
Peace :flag