In fact that's the first professional school I went to. It gave me a wide range of ideas, and I'd say I'm a good clown heading for being a great clown. Though I haven't experienced their school yet, I know many people have and say it's a wonderful experience. If you look for a school that just has 1 or 2 instructors, you won't get the same great experience even though its more affordable. Don't get me wrong, I'm sure you'll learn some things, but the philosophies to be shared will be limited.
Actual character is the most important thing in clowning.
This type of class should teach you how to find your character's walk, talk, and other expressions to exaggerate. Many beginner clowns skip this aspect by mistake of not knowing what clowning is about. I made sure I got the proper training. I hope this helps you and any others with the same question. It should fit your personal character to some degree.