One of the encouraging things that swung it for me was their money-back guarantee. If you don't earn all your fees back by the end of the course, they give you a full refund. That's what you call confidence!
Hi pipread! I looked at a few writing courses, and the Writers' Bureau do seem to offer the most comprehensive coverage. It's a home-study course, with no real time limit, so I can study at my convenience. I'll let you know how I get on.