Overall pretty nice walk, couple not so nice road crossings and some zig-zagging, but worth it (and because of renovations somewhere in the end you cant use stairs properly, because of that i climbed pretty steep hillside)
Actual length ~6.5 km and took me 1 hour 10 minutes by foot
Very nice picture, but horrible portal build up. Very often portals from next mission are same as portals from last mission, so not suitable for smooth walking, was forced to wait after heat sinks ran out.
First 18 missions are filled with pure evil and hatred (especially because 3rd mission last portal has been moved and that takes you to nice 4 km there-and-back trip) ... but after that it is very smooth sailing
Beautiful banner, has some issues, in Viru Keskus one portal is barely reachable (with iPhone my friend was forced to go inside and use local shopping centre WIFI and ... pray ... luck was with him this time).
Very good mosaic with nice flow, some places need a little bit back-forth walking. Painfull missions are ones with market street and red light distict (do not EVEN think about to do that 23:00 in the evening ... crazy slow movement).
And be very aware after 14th mission, because 15th-16th are leading you in park, but 17th mission starts right next to 14th end and ... so i sadly missed those two, straight to 17th mission after ending 14th.
Discovered my mistake on 30th mission and ... made everything again starting from 15th.