Done installing and did some testing. I got 108, so the idea of a new build being put out is either wrong or I got in on the tail end of the old one.
First impression is pretty good. I like the UI overhaul and the expanding maps. Not sure about the media player yet, but it's not immediately horrible. Radar seeing two cars ahead worked well, but I didn't do any freeway driving so I didn't test much with Autopilot. Voice commands seem to work a lot better now, and I like being able to just push the button once and talk, instead of holding it down and then releasing it when I'm done. Perhaps best of all, everything seems way more responsive. It's still not iPad-smooth, but everything on the big screen feels much faster, especially things like scrolling or zooming the map.