It is really a tough thing to try and evaluate which school or franchise within an erea is reputable or not. The school you are talking about is a hagwon (private language school) like many of the thousands that are set up across the country all with different names. As a general rule, most people teaching at these schools either like them or they don't. There is hardly an in between opinion. I have been in South Korea for four years. The first portion of a year was spent in a hagwon, and the last three plus years in public school. You can probably guess from my last sentence which is my preference, but the choice is yours to make.
I would strongly suggest asking questions before making a decision about where to teach. There are way too many options available to you for you to make a hasty judgment call about one school or location. If the recruiter is being pushy or the people at the school are being pushy then that should raise a red flag to ask more questions and get more information.
Hope this helps a bit...Cheers