Most likely you like the new design of the GTX, I had the same issue as you. I requested an exchange for the live wire +, same amount of money.I bought my GTX for my 2015 F350 in April, I kept getting a reoccurring check engine light, all within 2 weeks of install, contacted SCT, got a story about my computer and plugging it into the device, used a different PC and then they said I had to send it back for them to download review and return. Well I got it back and it was a brand new GTX, hooked it all back up, and there was no tunes to be able to load. Contacted them they had me try to load a stock tune that they sent, it did load, but still no other tunes, so they had me give them all sorts of number from the device, and they were going to talk to engineering. Well after another month going by they tell me it’s on there “to do list”. Contacted them again and they said there having issues with the software and they need to rewrite it. Well it August and they told me today that they really don’t have an answer as to when it’s gonna be done, asked to talk to a supervisor, and of course they were all in meetings and would call me back. So 4 months with an expensive monitor and still no answers! Anyone else having any issues like this with there SCT GTX on a 2015 6.7L F350 ?