My experience of the application was long with a fair few ups and downs. I went through a recruiter and they wanted to ensure that I had everything perfect which did mean redoing many things. Also, prepare for plenty of paper work.
Arriving in South Korea, the EPIK team were awaiting everyone. They were well organised, friendly and efficient. Then the training. This was a full schedule. Prepare for long days and long lessons. One the site I was on there were plenty of facilities including a cafe, a shop and a gym.
My advice, take some of the training with a pinch of salt. Literally everyones experience will be different. Lucky for me I am super happy with my area, school & co teacher. Others may not be.
Be open to anything, and just enjoy this time you have away. The students will love you and that will 'make' your time here.
Don't forget to travel. South Korea is so efficient, which makes it so easy!!!