FWIW, I read a comment on another web site from someone that said their Bully Dog system may have had a gas leak issue, there was a propane explosion that destroyed their turbo.
In fairness, I have no way of knowing what the exact circumstances might have been, or whether the report was due to an installation or hardware problem.

I ran across the subject while researching the subject for use on my own truck, my thinking right now is that I'll stick with a chip, exhaust and intake and call it good. I can already pull a 30' camper over the mountains as fast as I want to- or can safely go, anyway! If I ever go beyond that, I'm getting a Garrett ball bearing turbo upgrade.