Exactly...every one backs up their stuff with a 2 year warranty, from ESS to Active to Evolve to probably every decent tuner out there. Any one that doesn't have a two year warranty shouldn't be in the game. Active has been on point with any of my warranty issues above and beyond their responsibility.
However, Dinan takes it to another level! As the above post mentions, they will cover much more than the others and of course free labor too! I don't think other tuners will reimburse you labor costs.
There are many quality tuners out there but if you know the history and what Dinan has done...they are just on another level.
2014 M5 Competition Alpine/Sakhir
BMS Tune. Undercover Performance Custom Downpipes & Connector. H&R 10mm Spacers. BMW CF Rear Spoiler. IND Cosmetics. ALP & BEL Radar & Laser.
2011 Space Grey E92 M3 AA Gen 2 Lvl 3 586whp 398wtq SAE (sold)