Larry,
I have been using the new firmware with no issues. Most improvements had to do with the addition of the ICE controller, but the motor starting is vastly improved, the governor resolution seems to be better, and you have more selection for PWM rate which really only helps you if you plan to run low rpm.
Now, Crist has had issues and did some flight data testing showing that his motor and batteries ran hotter using the new firmware and I believe he was opting not to use it. I haven't seen this problem yet and have updated alll of my controllers to the new firmware. We flew the 6S Strega using it and it worked great. I believe that my uncle Dennis' Hellcat, and Pathfinder are using the new firmware as well.
I hope to get some more flying with the ICE to see if there are any issues with the firmware that we need to bring to Castle's attention.
Take Care,
Archie Adamisin
Muncie, Indiana