From my point of view a really great banner. And it can be achieved quite easily. Be careful, the streets are in a really bad condition. I stumbled several times...and I wouldn't do this trip at night time...
Can be done in about 2h, when you do missions 1 and 14-18 by car ;-)
On the other hand: you can't really do the whole banner by car and doing it by feet meens walking a lot during the last 5 missions.