Before joining any course, I would request details about exactly who recognises their course. There have been a number of questions raised about the quality of accreditation bodies. A course like the CELTA is recognised virtually everywhere, so it is a genuine qualification. They may enough for private tutoring, and if you are sure that you will only want to do that, then they might be enough, but if you should wish to work in an institution, they might not be, so check that carefully. Ask them simply if places like International House, the British Council, etc, would recognise it.
Here's a somewhat cynical view of some of the bodies: http://blogs.free-esl.com/blogs/blog.asp?fEntry=239
(The information about the addresses of ACDTEC and Eurolink is out-of-date)