Upgraded, 2017, S100 D, 2.5 autopilot (ESD), and mcu 1. Totally agree with the review and really nice job describing the new infotainment system.
As an aside, there was some confusion about whether a new screen is include. The tech told me they used to have an option for just a new computer, but now all upgrades are new screens and computers.
No lag with voice controls, maps, streaming, or any other functions. The lag and what I think was "buggy" voice controls and streaming functions were very frustrating with mcu 1 and why I upgraded. Very, very fast. The visualization for FSD (I have Enhanced, but the upgrade allows me to toggle on/off FSD "visualizations") are great. One setting that was also not retained was Homelink. Not a big deal at all, just had to reprogram Homelink to my garage door. Tune-In is great for streaming my local radio stations. Not all local stations are streamed, but fortunately the stations I frequent are streamed on Tune-In.
I really feel that the upgrade was worth every penny. Maybe its me, but I feel like I just bought a new car.