Well, Audio is super important to me, so not only did I upgrade to UHFS, but I just got the Reus upgrade installed today (after a great 1-SC stop trip from the Bay Area to Anaheim). I am very satisfied, it is super crisp and clear, no distortion, and amazing immersion in the car. Whether it is worth it for any one person is up to them of course, but so far, I am very happy with my decision to drop the $$ into this system. The install is super-clean, appears completely factory. They use the existing subwoofer from UHFS (relegated to a narrow band of lower-middle frequencies), and then add their own 10" subwoofer as well in the "hidden compartment" of the rear trunk. Another big change is the tweeter replacements in the pillars, as well as the "center enhancement" tweeter that goes behind the rear-view mirror. It bounces it's sound off the windshield and "sprays" it across the soundstage from the front, it is pretty awesome. They actually use the speakers that come with the car in the doors (unlike LHR). Apparently, they are more than adequate for delivering the mids they are expected to deliver, and not counted on for any lows or highs. I listened to UHFS the entire way up from the bay area, on many types of music -- it really is bad. Sub is completely muddy, and sound is not properly "separated" across the various worker speakers - it's muddy overall, distorts and louder volumes, and provides little clarity. The difference from UHFS is night and day. I still can't believe that Tesla does not offer a decent sound system in a six digit car. That is really the right solution here, a decent Bose, Harmon/Kardon, or even Sony system would be much better than the UHFS - and I would have probably been satisfied with that (as I am with the Sony in my Ford Fusion).