Wow those guys know how to charge
I would also be interested to see the dyno graphs as somebody said most of the tunes you see have a big bang of torque either down low or up high - this does not improve the drivability.
A proper tune should have its power distributed smoothly across the range.
As for the warranty, nobody would ever have to go chasing for a claim as a remap is un-detectable. The main dealer cannot detect a remap unless they remove the chip from the ECU and send it to Bosch to be opened. - It doesn't happen.
It is a popular sales gimmick over here in Europe also with a warranty that matches the Dealers warranty. It is a gimmick.
Sorry to be so abrupt in my first day of this forum!
Aidan