I have a 2012 5.0 6spd with about 16k on the clock. Its my DD and I had it tuned ever since I hit 1k. Ive also had tunes from 5 different tuners and never had an issue with any of them. They all perform relatively the same (track times) with the exception of throttle response and maybe 1mpg here or there. I wouldn't worry about hurting your car with a tune. I plan on getting an AED tune soon because I here so many good things but as for right now my favorite tuner overall is bama. (mpg, power, smoothness, and customer service)
FYI: Ive had brenspeed, bama, torq, bbr, and jms chips
thanks for the info!