Don't forget, this is essentially an "off the shelf" or "intenet" tune. I have only been provided this 1x file and it has not been revised / altered etc. I haven't even done any VCDS logging with it at this stage. And the fact that its a stage 1 file but im actually running stage 2 hardware might be affecting the A/F ratios too. A dedicated stage 2 file would most likely address this.
Not sure if you are aware, but a Viezu tune + the optional hand controller is around $1,400 now.
As for fuel consumption, im getting 10.6 L/100km at present as my overall average. On the freeway im getting around 8.5-8.9 or so. Its definetly using less fuel from when i had the Bluefin (Bluefin ran really rich). I only drive the car about 100km a week on average so i don't worry too much about fuel consumption.