If you can't find any review on them, then look at how they present themselves. They say they will train you and get you a job later. Those who know the ESL industry will tell you that this entails some important pro and cons that you should carefully consider in comparison to similar offers from other providers. I have listed the information for you below; it is from their website, and now it is for you to do your homework before you decide.

http://www.teflsupreme.com/about_us.php

What do we do?

Place English teachers in schools in Thailand earning a competitive salary- provided that you have an Education degree or a degree in English or have another degree and have already completed a 100+hour TEFL course.

What else do we do?

If you have a degree but no TEFL qualifications, you can complete the 120 hour course with us and then be placed in a school, also earning a competitive salary. You can choose to take your TEFL course in either the historic ancient capital, Ayuttaya or on the beautiful island of Koh Samet.

If you have not yet got your degree but would like the opportunity to teach, we offer an internship programme to undergraduates studying an Education, English or Linguistics degree. This means that you will take a short (30 hour) TEFL course and then be placed in a school for a minimum of 1 semester (approximately 5 months). You will also earn a basic salary which will cover your living expenses.

However if you only want a short term placement we can alternatively offer you a volunteer teaching placement (5-6 weeks) during the summer on Koh Samet.