Did anyone study at JTIS (Japan Tokyo International School)?

Hi there, I want to move to Japan next year and I'm thinking about studying at JTIS. However, there aren't many reviews here on Reddit and I would like to know the experiences from other people.

I’d like to know whether non-beginners in Japanese are placed at the right level (I read a review that said otherwise, but I wanted to hear from others).

And I would like to know as well about the pace and intensity of the classes.

I'd appreciate if someone can shed light on this.

Thank you!