I had two first generation GT7's blow up on me before I switched to a Keyence Zero V Extreme. I ran a GT7 at the Novak race in Milwaukee this year and it's been bulletproof since Charlie (Suangka, of Novak) yanked the internal Schotky out of it for me. I love the ease of programming of my Keyence (I despise counting blinking LED's) but I prefer the "feel" of the GT7. If the GT7 worked with a PitWizard / Milenium Pro charger for programming, I'd run nothing by orange ESC's in my cars.
Charlie, are you listening?
Rob