The Mosaik is not Bad. But a few frustrating points: You need a couple of HS because same end/startportals. Also some detours are not really understandable. All in all we needed around 5.5hrs with Destroy/Fielding. At night its advisable to bring a Flashlight to Bürgerpark.
All in all not at all terrible and you see some really nice places in Bremerhaven, but room for improvement on the Routing :))
Nice Mosaik, but the Routing during the first two sets of missions is just awful. The last two sets are a bit better but still a few glitches in the routing. A lot of going back and forth. Its doable by bike, but it's designed for walking. So either you talke a detour or you pack your bike under your arms and take the stairs. Same applies for trolleys etc. But still I'd like the picture very much and would do it again.