Not done the course but I have had a look and apart from a list of subjects I don't see much information.
Personally before shelling out £500 I'd want to see a sample of a "lesson" and an "assignment" to see what the content is. I'll be honest I have the impression that they get their money and you get the pass provided you submit all the assignments. When I read that the course 24 lasts weeks and is supposed to prepare people for professional photography but you can start with no knowledge of photography it doesn't inspire confidence that the course has much value.
What do you want to get out of doing a course like this? As far as I can see there is no recognised certification at the end of this but if you aren't bothered about a qualification and just want the knowledge it may be OK, although I suspect you could do better through another route.