I think i was the same at the start but now i wouldn't go back. I like the fact that when i go along the map pulls back so can see more and as i approach directions it refocuses. The traffic data is very neat but is reliant on input. However something i really like, last night it tried to send me the wrong way down a one way street. Got home, went to the editor and corrected the road. No other users will now hit that issue, i don't think there is anything comparable on the market that could react that quickly.
The only thing it could do with is lane handling which Co pilot does but never been caught by this issue, just would be nice.
I have a pretty good car sat nav (accord) but i now use waze over that.