I'm strongly considering doing this next year. You usually go through a company that organises everything from your visa to your accomodation. And you having a degree that will accompany your tefl certificate have the advantage as you'll likely be placed at a private school and also have a bigger salary then than people with only tefl. I think the biggest obstacle is finding the right company to arrange everything for you. And also how much commision cut they take from your pay. But other than that. It can only be a great decision as you'll be living in paradise for a year. Can even go to the island they shot the movie the beach on over weekends.