Pros:
Hamburg's first (and my favorite) discgolf course is located in a stretched out public green space in the (mostly) business district City Nord. As such, it gets mowed regularly and you are not bothered by the masses that flock to the adjacent Stadtpark each summer. There is still your eventual dog walker or picnic crew, but most people are getting used to Discgolf being a thing and a friendly word will clear your fairway the majority of times. The course is easily accessible by car or public transportation (U1 Sengelmannstrasse, coming from the south it's also a nice bike trip or walk through the Stadtpark).
It has seen recent changes in layout due to construction by the city, as 2 original holes had to go. But the local Discgolf club does an outstanding job of rolling with the punches and included 2 alternative basket locations and even added 2 more at HDI campus (making this a #16 hole instead of the original 14). The 2 new HDI baskets (#14 & 15) seem a little detached from the course at first, but make for a really nice addition.
Hole # 10 is somewhat of the signature hole and played from top of the bridge (despite the tee sign being at the bottom). #11 is an island hole that has some unique wind conditions, as the gaps between the high buildings shape the wind and make it sometimes come from different directions in different sections of the shot.
If you need to stack up on drinks or snacks, there's a gas station just 150m on the right from hole #10 tee.
Lost and found discs can be dropped / retrieved from a box on the rear of the course sign at #2 basket.