There are 2 missing streets (as in they exist and I drive on them often) within a 1/2 block of my house and about half the speed limits in my area are just wrong (causing poor routing in weird ways). I have also had it off by 20 or more min on a few trips (also likely due to the bad speed limits). Other issues like u-turning to your destination (mapquest days flashbacks) due to I think just not having any info on where entrances to parking lots are.

I literally ignore it when it tries to re route me.