As far as beach restaurants on the island go, this is a solid choice. We had a 6:30 dinner…read morereservation and were seated promptly. The staff seems a little disorganized, but overall well meaning and kind. Our waitress easily handled English (not all do) and she was knowledgeable about my gluten free options (also, not all do here in Germany). In our party we had the schnitzel (delicious), and two wonderful fish dishes. One special over puréed veg with ratatouille. The olive tapenade and bread selection were excellent (as well as a pumpkin seeded option for me).
The atmosphere was rustic. The back of the restaurant closest to the beach had a cool fireplace that would be perfect for after dinner drinks. Details were fun, right down to the pony hair placemats.
Worth the trip out to Wieße Düne!