Never had an issues with iGo except loosing the custom pointer a few times. Mines set to show on screen and talk the next direction and its worked everytime.without fail. I havent changed anything in the settings from new.
I have found if you select fastest route it takes you on some very interesting roads, but any other setting and it'll take you main road routes regardless if the destination is 10 mins away. Still a million times better than my sense of direction so its alllllll good