For anyone on the fence about this...do it! I traded in my Model 3 for a 2017 Model X and the step down to MCU1 was painful. I only lasted about 4 days before making the service appointment
Aside from the obvious well known performance and feature improvements, there are a lot of secondary improvements too:
- Weird MCU sleep issues and delays starting up the car are totally gone. Plethora of settings to control MCU sleep behavior are gone.
- Bluetooth and wifi connect way faster.
- Autopilot nag to autopilot jail period is longer...harder to end up in autopilot jail.
- Nav audio overlay is significantly improved. MCU1 would do a jarring left/right balance change and wasn't smooth at all. MCU2 Nav audio is seamless and pleasant just like it was in the Model 3
- Both the instrument cluster and MCU screen appear to be sharper (higher resolution) and have greater brightness range (0% is dimmer and 100% is brighter). This *could* be a placebo effect...wish I took a few close-up pictures before to be sure.
- No more screen border yellowing (yes...could be fixed without MCU upgrade, but nice to hit 2 birds with one stone)
I finally got my MCU2 upgrade installed yesterday and was extremely happy after paying $2700...Then I woke up this morning and saw that they price was reduced by 40% and now costs $1500.