More locations: Now over THIRTY. More choices: special programs, volunteer positions, language classes. More security: Members of BBB, all courses externally moderated. More Accurate Info: No hand-picked testimonials, all course feedback availble online. More Support: worldwide lifetime placement assistance. More Experience-running worldwide courses for 10+ years. More FUN! ...... TEFL International
The value of the course is as discussed in this thread.
Whether you can DO the course is a different matter; if the website was down for the weekend, ok, that happens sometimes.
If the website had closed, or moved, or some such tings, then GroupOn should have procedures for helping you out.