I graduated from the 6 year English MD program at MUW in 2010, on the basis of my experience I would answer in the following way:
1) The administration is solid. It is supportive of international students. They will not treat you as royalty. The level of bureaucracy is high and requires patience. They will support your education but not any immigration issues, visa issues etc.
2) It's a good program, however living in a foreign country requires a good deal of independence, resilience and maturity.
3) If the expectation is that your education will be spoon fed, you will be disappointed. It's hard, hard work. All of the faculty I encountered would go out of their way to help.
4) USMLE has always been a self driven activity. There is support but ultimately the hard part is doing the question banks, reading the prep books etc.
5) Can do clinical rotations outside of the country but you should try to gain pre-approval (discussion with the dean about where you intend to do your clinical rotation), the curriculum describes the activities you should do and what you should accomplish for each clinical rotation. Where it is done doesn't particularly matter.
6) In my year, the biggest group of my class were Norwegians and Swedish and of this group many were Asian. We had a few Pakistanis, a few Iraqis, a few Iranians, a few Nigerians, all in all it seemed quite diverse. I didn't perceive discrimination. However I did observe culture clash issues. At the end of the day the expectation is that students will integrate with local custom and culture, thus if one comes from a culture of antiquated religious ideologies and ideas of male dominance and the rest of it and in turn expects the locals to change their beliefs, customs to suit....somebody is bound to have a bad time. The atmosphere was good, loads of social events, activities outwith school.
I am exceedingly happy with my education and I would be happy for my kids to study in Poland. I have met some not satisfied, however those not satisfied I found tended to feel that because they were paying they didn't have to put in the work and naturally, this can't end well. Medical school is very hard, nothing is given.
Dr Jason Alan Graves Lek MD
ACCS Emergency Medicine ST2