My Symbian based Nokia E66 phone has Ovi Maps installed so one day I decided to make use of routing function in it when I was driving to the town (on a road where I did not needed to be guided). BT headset on ear, paired with phone and let’s drive.
At start road was selected quite properly, the problems started later. Many times it was recalculating route (the funniest was when I stopped at traffic lights it recalculated route and then made it again after driving for 5 meters). Directions changes information were also distracting: “on 200m go left” then “go right” when I reached point. Or “go left,right” when it was straight road or when I had to turn right at crossing.
I have to admit that after two tries I totally gave up on driving with it and switched back to TomTom device. But there is one good thing in Ovi Maps — it works quite good for walk navigation. I used it in many cities abroad and it handled. I hope that Maemo5 version will work at least that good as Symbian one.