I have a sneakytuned file for my GLi (same platform). It makes very good power, but the turbo lag and accelerator pedal mapping weren't great to me. I don't have a dyno, but it seems to make more power than the Unitronic tune I had before, and more than the base Cobb maps (of course). I have nothing bad to say about sneaky, and he is quick to answer emails about anything you might need. I'm running EQT right now, but I've tried a few different tunes. Eqt is smoother for daily driving, but I felt like sneakytuned made more power, it was just kind of laggy, and the power would hit in a sudden surge. My car is a 6MT 2019 GLI.