I have a couple and they seem to bloom pretty easily for me. I'm growing under lights though. I have often admired Berenice. In fact I almost bought one at the Pacific Orchid Expo a few weeks ago. They seem to do well with bright light and you really need to pay attention to water. I have found my William Ambler to be very thirsty.
Those are my principles and if you don't like them......I have others.