Yes, it is annoying, along with some of the crazy routes it tries to send me on. I was just in a completely unfamiliar area using the NAV and it was sending me all over the place. But since I didn't know the area, I didn't realize it until after I had gotten to the destination and then could clearly see that were more direct and shorter routes. It does it all the time and makes me crazy. One thing I do like, however, is that it remembers how I typically drive a route, though there may be other options that could be better, and it routes me they way I want to go after I have driven it a couple of times, even if I am not using the NAV on particular routes and then do use it later. It also seems to get the hint pretty quickly when I ignore its route and usually recalcs very quickly. Though yesterday it didn't...
And we desperately need alternate routing choices and waypoints! My 8YO Acura has that.