Did this banner on 13-7-2019. The order of the portals is sometimes illogical and has you backtracking or using a heatsink. Other than that is pretty easy to do, it does skip some portals along the way and might need an update.
Nice flag picture, the route needs some adjustment though. There's a lot of back and forth between portals, in some missions the order is rather frustrating. Could do with a review from the creators to make the route a bit more logical.
Fun mosaic which takes you to 4 farms around Tallinn. Unless you want to do a lot of walking, using public transport or a car to move between farms is your best bet. The last row is in the Armed Forces cemetery which may not be open 24/7.
Great picture for a banner. Quite a walk around Helsinki, not all portals you meet are part of the banner so if you're on the lookout for unique visits be aware. Missions are in any order which sucks at times if you're not a local.
Nice banner centered around the national theatre in Prague. The questions/passphrases are in Czech so some Google Translate skills are required for foreigners. Other than that the questions are pertinent to the banner subject. The banner finishes where it starts.
A beautiful image but a rather dull banner to do. It goes round the St. Mark's church four times. The local who created it told me he made it a long time ago and the challenge is to do it as fast as possible. There's some climbing involved as the round has a portal halfway up/down the funicular incline which is pretty steep. Other than that you might need to bring some heat sinks in case you get burned out. If you want to do it at a leisurely pace there are cafés near the church where you can stop for a drink or a bite to eat.
The order of the portals in most missions doesn't really make sense. A lot of portals along the way are skipped too. There's a lot of senseless way points where you could hack instead. After mission 17 the distances between portals increases exponentially, I stopped after mission 18 and the banner looks fine.
Did the banner today (17/9/2016). Cycled/walked about 40km in total. There was a street market and one of the streets was closed to cyclists. In some missions the portal sequence seemed a bit off to me, but that could be down to the bike path you take. Other than that, a nice banner to cycle in an afternoon.