I would highly recommend the class.
The lead instructor has put together a spey casting school for my lodge in Quebec and they (ORVIS) now do their spey schools at my lodge each June. The attentiveness that the instructors give the students is impressive and we hear very positive feedback from the people who attend our spey schools who also had attended the ORVIS schools in Vermont.
In the case of the schools at my lodge, the participants enjoy it so much that the "refresher" schools fill up immediately from past participants in the beginner schools.
Bill Greiner