Just would like to remind you that those piggyback computer (tuning box) is very effective for turbo engine, but not much on a supercharged one. I'm have been using Racechip on audi Q5 2.0T and F-pace S 3.0L petrol.
And your results?
I know they work better on turbo engines, as the boost is more variable on those engines vs. the relatively fixed boost level of belt driven superchargers. But the same would apply to an ECU flash, wouldn't it? I want more power. Period. And I don't want to flash my ECU because I like my warranty