Checking in from over the pond. This has seriously piqued my interest, the Greddy kit in particular. I already have an Ecutek licence and there's a Ecutek tuner about 45 mins from me... ITBs is about the only thing I've never done to a car, I'm not chasing numbers, just looking for a nice noise and to tick a box on the bucket list.

Any performance increase is a bonus as far as I'm concerned.
That said, I'm a realist. I don't really know much about ITBs or how this might effect the general usage of the car. More air means more fuel so mileage is going to take a hit yes. But what about sticky throttle in cold weather? Heard that can be an issue if there isn't coolant running around the TBs and you live somewhere that gets near freezing temps. My car is a daily and in the UK we do get some interesting weather/seasons but nothing to the extremes that you might see in say, Canada. So something to be wary of or am I overthinking it?
Anyhoo I'll be keeping a close eye on this thread, hope to see some numbers and some more info soon.