B73
Might sound that way, but definitely 100% not. I know him as do a few of us here, I respect his work and if I had to choose today thats what I'd do. No commercial aspect to it whatsoever, just plain advice which may or may not be right just like anyone elses.
Having seen some of the other schools CPL(H) groundschools 2 years ago , and compared them to the Bristol notes I have, the Bristol notes were far superior however the content of the helicopter groundschool notes was actually relevant to helicopters (at least from an examination if not day to day point of view). I think its a good move that someone (regardless of who) has bothered to create an ATPL level helicopter groundschool for helicopter pilots.
Gary