I have been studying the online diploma course for around 6 weeks so far and have completed 3 of the modules although I have purchased 4 so far. Each module is well-put together and builds on the material from the last. The end of module tests are fairly rigorous and expect the student to extrapolate information rather than just regurgitate what they have learned; great for making you apply the content as you would need to do in a real-world situation. A very enjoyable and interesting course which I am 'bulking up' with some of Hypnotic World's on-line face-to-face training days.