I chartered with Moorings this summer and did do the briefing. There was some decent local info though it was basically just a powerpoint/ video slide show. I'll sit through it again when I go the next time, but 90% was info I had already researched or knew how to do.

The only thing that I was annoyed at was when I asked the Moorings Representative at the desk if I could go to the evening briefing he told me I had to do the morning briefing since I was starting in the morning. I should have just done the evening briefing because we rushed to get the food shopping done in the morning so I could make the briefing. Turns out I could have gone to any of the briefings according to the Moorings headquarters.