My one experience with Sunsail was the same as agrimsrund described. The presenter and the slides didn't redline anything. He even said if you take the shortcut into Gorda Sound you shouldn't have any problem with a cat but you might with a deep draft mono?!!! After I left the briefing I thought yeah he can be casual and say anything but if I'm breaking a rule and something happens, I'm screwed!

I much prefer an individual chart briefing, they usually have some idea of how familiar you are with the cruising area/experience level and what your plans are - it's just a more efficient way for me to get the info I need.