Yes. I went to it last year. Helpfulness depends on the quality of your program's teaching. We have very strong radiobio, so I was looking more forward to the physics help. I thought overall the course was well run and taught. Certain topics were helpful. I can't really say that it helped me a whole lot for the boards though.
Bottomline: helpful, but not crucial.
(I still haven't figured out the best study resource for physics. In my experience and opinion, there's nothing really out there that's helpful for the current format and style of physics boards [more clinically oriented]).