Hi there
So done a couple of drives now since the GTS software flash:
Steering - Immediately noticeable, comfort is now a touch heavier than before but I never drive in comfort, sport and sport+ seems the same, I always drive in Sport+ and the steering is just on another level of better, it is not as heavy and is a little hard to explain but the steering now has a far more natural hydraulic type feel to it, in short the improvement to the steering is night and day, it is a natural feeling, as such you stop thinking about the steering and just enjoy it, I'd say there is also maybe a touch more feel, but the weighting is now perfectly judged. Mrs drove it in sport, which is her preferred mode and she also said the steering feels much better, so a big thumbs up from her.
MDM / DIFF - I am going to talk about these together now as I felt before MDM was really kicking in too soon, to the point it was not really letting the differential work, whereas now MDM and Differential seem to be working together more, it is far less intrusive and you can feel the differential really working especially in a minor power oversteer situation where the MDM is allowing the slip angle and letting the differential do what diff's do. As such less intrusive and the differential seems better at putting power down.
All in all the GTS software has transformed my manual M2 OG, so if you have a DCT car it will be an even bigger upgrade!
For £120 from ZED Coding, absolute bargain and it took him around 90 minutes from remote login to flash the GTS software and the IDrive to V6 with Apple full screen CarPlay, total cost for all work including cable an antenna was £250.