Welcome to the stage 1 club Tim. Fitted my MMC equivalent a few weeks back and now covered 400 miles with it.
Very loud stacatto crack when blipping throttle but fine when burbling along at constant speed. Not a massive perceived performance increase but huge improvement in engine tractability.
Now the adaptive ECU mapping has had time to adjust, it will pull smoothly from 2000 rpm in 4th now. Although I don't make a habit of this I do find I'm making fewer gear changes around town.
Idling is smoother and it seems mpg may have improved a tad as well. All in all
Hope you find similar
