I got this latest version at my local service center (vehicle in for 12.5k mile service and fixing a few problems).
My impressions so far are that it does well on the interstate, and pretty well in stop and go traffic. Perhaps a bit better than 2017.34...cfc, but not significantly different.
On surface roads, I now find that it loses track of the road markings on curves. This is new, .34 seemed to keep track of the lanes pretty well around these same curves.
When going down hill, it completely loses the road markings at the bottom as the road starts to go back up hill. This is consistent with .34.
In my mind, this version seems to be a step back on local roads, and about the same on the interstate.