Almost usable. Trying out the free options before I plung in for the paid version. Seems good at first, then random parts of the map start flashing weird colors. No other navigation app does this so it leads me to believe it's an issue with this one. Really sucks because I wanted to live it and pay for additional features but this issue makes it unusable. I will be contacting the developers and offering to send the screen recording I took (while parked of course) so they can look into it.