It's free for one month, then $100 / month after.
At this point, I don't think I'll be subscribing. It drives too much like the New York cabbies you referenced. 
It still seems to have troubles with our Montana Speed limit signs, but I'm sure that will be fixed.
It brakes and accelerates more abruptly than I do. Doesn't seem to understand "Reduced Speed Limit Ahead". Instead, it waits until it can read the sign and then reacts with pretty abrupt braking.