Muay Thai training in Thailand recommendations?

Making plans to spend a month training in Thailand when I finish college this year, and would like some recommendations. The only gym I have looked into was Horizan in Koh Panghan. Price is not my focus as much as quality, that and most gyms I have glanced at were in a pretty similar price range. Experience wise I have trained in European style kickboxing for going on 3 years and in the p year and a half have been incorporating some Jujitsu and grappling ( not that that applies to Muay Thai).