The main problem with the course is the degree of recognition. In Europe, where the market is very competitive, you'd need a certificate that is widely recognised, like the CELTA. In countries like Cambodia, many schools would accept pretty much any qualification.
It depends what you want. If you're just after a qualification to travel and finance through teaching, then it doesn't really matter, though you might find it hard to find a job in Paris, say. If you want to teach as a career, then my advice would be to go for a qualification recognised everywhere. Many qualifications are in-house ones and are not transferable. Before parting with cash find out who recognises the qualification and check them out as well.
Compare the accreditation of the i to i course with the recognition of the CELTA: http://www.english-international.com/CELTA.html I'm afraid I don't know much about Australia, but there are CELTA courses available: http://www.cactustefl.com/tefl/cours...course_id=1702 For travelling, I'd go for a budget certificate, but for anything more, I'd go for this as a start.