So far so good. First time in, the update didn't work. Brought it back to the dealership and they spent a good hour on it. Said they ended up resetting the computer before everything started working correctly. Been about two weeks now and still no problems. Got the Commander used and wonder if someone had a different tune on the computer because the shift points seem cleaner now and mileage a bit better which the update shouldn't have effected, but the reset could have.
1999 TJ Sport
2010 XK Limited 5.7