Pros:
-There is a good chance you will hit an ace
-Very easy to find
-Relatively easy to navigate, as the holes just loop around the perimeter of the course
-Only takes 45 minutes to play
-Is flat and walkable
-It is walking distance if you are in downtown Reykjavik
-there is a small art museum with a cafe after you finish hole 9 (yes there is a bathroom too)
-the park is very pretty and well maintained with trees, flowers and other plants
Cons:
If you are looking for a challenge with long holes and challenging terrain, you will probably be disappointed.
Other Thoughts:
This is a very short, very easy course in the town square of Reykjavik. It is 9 holes, with each hole being about 200-250 feet. Most of the holes are of the same length as Rutgers DGC in NJ (USA). I would think of it really as a practice course or an entertainment course, not professional grade. If you are at the competition level, you'll be able to play Klambratun with a putter for the most part, which is why it's so great to play if you're coming from overseas, are only bringing a few discs and just want to get a quick round in. It was great for me because I was visiting for a few days,and had a friend with me who hasn't played in years so it wasn't a huge commitment out of our day of sightseeing to play this course.