I had a boat with TMM for many years. They take safety for charterers and their client's boats seriously. For years Sam, an interesting an fun Brit gave most of the briefings. He took it very seriously but was kind and funny. I've read a few disparaging posts here about his thorough breifings. The guy knew quite rightly some of the most dangerous clients were those that thought they knew it all. That is true in many venues of life. They would also do checkout sails that many do not. I felt better about putting a boat there and watching how they treated other charter owners boats.