I've done the wfp and marketing courses.
WFP was interesting, mostly knew it all already as had been using for over a year, just wanted the certificate really. Ok for newbies, bit of a waste of time for anyone who knows what they're doing.
Marketing though, that was something. Very good course, and the information was, to be honest, like gold dust to me. craig explained in great detail exactly what to do to get commercial work, and (of most interest to me) high-end residential.
Say what you like about ionics and craig mawlam, but they know how to do marketing.