Loved the trip! Excellent school, interesting teachers - and New York, an old childhood dream!
The summer course (traveled in 2018) was simple: basically the same thing that we taught in the gymnasium, but more deep. Everyone around you speak English, it's not from textbooks, but from living examples, so you can quickly improve English proficiency. I had a course for 2 weeks, and in principle, by the end of the third day, I already spoke fairly freely.
We had a lot of excursions: I really liked that teachers gave us a moderate degree of freedom, they did not lead on a leash around the city. It is clear that it's a large and unfamiliar city, but with teachers no one was lost - but there was time for meeting with friends and to walk, and take photos, and to go shopping. Fell in love with New York! Just do not describe and count the merits and what you can see here! Ideally, I would like to study here and after (now we are consulting about further admission to a university or college.