Schiermonnikoog is cute and pretty, but small. Very small. You can easily cycle the entire island in a day, or even half a day. The town is very quaint and picturesque, but average service on terraces is terribly slow and unfriendly, even compared to other waddenislands. The waiting line for bike hire after arriving on the ferry took over 20 minutes as well, and this was in low season September AFTER the summer holiday! Would not go back and wouldn't especially recommend it, but glad I went as I've now seen all the Dutch wadden islands. And I'm sure it's a much more attractive location when there's truly no one there during the winter.