This is an exceptional institution. I was a Double degree student in Portugal, and I must say I am really sad, that I left Koźmiński for a full year. The value gained from Koźmiński is exceptional.
My advice as alumni. Take as much as it’s possible, from here. Don’t limit yourself to classes. There is a great newsletter that will provide you with opportunities like internships, hackathons, and additional courses. Take from that, this will help You out by a lot.