Originally Posted by Roman@ESS
Depends on your comfort level with your dealer / service advisor. If you want to have your original software in for dealer visits you can reload it before you go. Many leave the tune in during general visits but that decision is up to you.
Yes - I was running an ESS tune with the minimal cold-start. I really like not having the car sound like a bag of spanners when I start it up on a cold morning, but it's also somewhat obvious to a BMW service technician.
For the moment, I'd rather not have any warranty arguments! ;-)
Don't get me wrong, ESS were pretty helpful and responsive at getting me the new software, but there's an important difference between 'updated software version available, please upgrade at your convenience' and 'license expired, you can no longer run this program'