I have never liked piggybacks and there is just something about fooling the ECU that doesn’t sit well with me.
I have a number of "illegal racing buddies" that have had an array of chips fitted to different cars and most sing the same song.
Once the buzz has worn off they start picking up problems like cold start issues, problems with idle when it’s hot outside or cold, Weird fueling issues and that’s the minor list
Some have more apparent serious issues, Like cutting out at higher RPM, fuel usage, intermittent problems.
I would go for a complete stand alone unit, but unless you’re looking to just be fancy or to go modification and HP crazy the stock ECU socketed could work for your needs.
I pushed 190 Whp or 140 Rwkw on a stock ECU so I think the unit can take a few modifications
Just my 10 c Zim
Sorry Gary not trying to make you lose a sale or anything like that.