Tried it yesterday and noticed a couple of issues.

1. The console and dash display got locked to 100% brightness until it went into dark mode (tunnel/evening light).
2. The map didn't get displayed on the car's second display on the driver's hud/dash; only the directions showed there.

The map was also more sparse compared to Google's. For example, it didn't show the lanes for highway turn-offs and a few other things like voice guidance (which I don't use anyway), but that was the only one that I genuinely missed.

Still, it was very usable and I liked it overall.