I haven't taken their course, but I own a medical transcription company and have been a working MT for 11 years. One of their graduates does work as an independent contractor for my company and she's fantastic! In fact, I decided to give her a shot part-time while she was still taking the course since she's a friend of one of my best MTs. No regrets at all.
However, I will say that she came into this field with years of previous secretarial experience and excellent grammar/punctuation and typing skills. The MT course won't teach that, but the profession depends on those skills as well as the medical terminology.
The only caveat is that many practices are switching over to electronic medical record systems that are now automating many of the things we would normally type, so the amount of work out there for small companies like mine seems to be disappearing. We are also competing with companies who have base offices in the USA, but outsource the actual transcription to medical students in India who work for wages so low that we can't possibly compete price-wise.
The course may be a good one (and they have an A+ rating with the Better Business Bureau), but I'm not sure I could recommend going into this field. It seems we are going the way of the dinosaur.