Took us about 4h to finish. The banner is great, the way between portals at some points very long and the path a bit strange. At the beginning you have to walk uphill, after mission 10 it'll be easier.

Nice banner, good route with lots of uniques ) took me more time: I couldn't resist and leave L7 - L8 green portals on my route. If you do hack only it will be much faster )
I never been before in this area (except for Andel), so it was good to visit this part of Prague. Thank you!