We did the non-denominational service on our 7-day last May and found it rather unsatisfying. It was led by a young CM who does youth work somewhere, but who was just "reading" a service, but not feeling it. The music wasn't my style... it was watered down so that nobody would feel uncomfortable with it's being too "churchy". But I have read that they've arranged for clergy to come onboard for major Christian holidays such as Easter.