This is Steve, my old USA customer, he has ordered the Xhorse VVDI2 Commander last month, and share the feedback with me.
I successfully added a key bcm2 on a 2013 audi a5.
2007 Audi A4 B7 RB8 crypto – mileage correction ok
Audi BCM2 adds spare key by obd worked fine, and I did one on a 2013 A5 and it worked flawlessly.
A6/Q7 EZS Kessy: Added a dealer key (remote sourced from the dealer) without issues. Seemed to read everything properly but I had a working key to begin with.
Audi A6: Testet with A6 read kessy working, learned new key
Skoda Octavia 2006: got CS & PIN, programmed key fine, but not remote programming.
VW passat. B5: Pulled PIN, programmed key, corrected miles.
VW Passat B6 2009: Pulled PIN but couldn’t get 6 bytes CS, needed comfort dump.
VW Transporter T5 2006 : Pulled PIN Programmed key, no remote programming.
Audi A4 2006 : mileage correction success .
Audi A6 2003: Mileage correction fails. car not start. remove battery terminal. car start.