It seems to have a British flavor (no surprise) but no one seems to care where you're from when you sign up.
One thing that's nice is that it covers all genres, and allows an author to assign whatever categories his or her works fits into—romance and mystery for example, or YA and historical fiction. Unlike a lot of multi-genre workshops, it does not lump fantasy and science fiction together but allows the author to specify one or the other or both.
Cool!