Is there any academy in Seoul that you would recommend?

Do you have any academies or schools in Seoul that you really liked? Many people know the list of academies to avoid, but I'm curious about the places where people have had positive experiences. 😊 As a foreigner living in Seoul, I'm not sure what factors to consider when choosing an academy. If anyone has had a good experience at academies in areas like Gangnam or Hongdae, I would appreciate recommendations or sharing experiences. If you know of an academy where communication with teachers is smooth and there is an open atmosphere for foreign students, please let me know. Sharing different opinions would be very helpful!