I am interested in getting a TESOL certificate on-line. I found a relatively inexpensive one at linguaedge.com. Does anyone know if it is reputable/widely recognized? Any associated problems? They offer a 50-, 100-, and 150-hour course? Is there any real advantage in taking either of the longer courses (here I mean jobwise, and not in terms of making you a better teacher)? Also, has anyone found a TESOL or CELTA, or any other acronym, to be more useful/more widely accepted than any other?

I thank you in advance for answers/advice to any of my questions.

Blake