The throttle response was the first thing I noticed. The car was tame until the Lund tune. Now I have to really pay attention to how I drive. I have had tuners on my SRT Challenger and SRT Charger. Those cars never reacted like the Lund tune in the Mustang.
I haven't had any problem with running it on my Mustang. Now my 2015 F350 is a different story. I found out that if my tuner is plugged in, it will not collect and send the health report. I don't leave the tuner plug in on the Mustang either.
I agree too. I had the 2011 SRT Challenger and 2013 SRT Charger. They are fun but the GT seems to be a lot more fun to drive. I love how light and planted the GT feels.