First I need to ask- what is your goal?
If your goal is to get MD degree and come back to US for residency- it doesn't really matter which polish medical school you graduate. I am not sure about your case (High School in US and how they translate it for polish system- we had to take "mature exam" at the end of our High School in Poland)- get info about this and about "enterance exams" to medical school. I assume that you are not polish citizen and have to pay for medical school in the same way as for 4-year program.
If your goal is to stay in Poland - it doesn't really matter which medical school you graduate also. The only thing which is important after that for your employer is your degree and CONNECTIONS.
Lublin is one of the worst medical schools in Poland -polish students go there only because they are scared about higher cutoff in "enterance exam" in other schools. The city is terrible, very very small. The plus- life is cheeper then in big metro like Cracow, Warsaw...
If you want to have pretty light study in small- town environment- go ahead. But you will not get good medical knowledge in this country and for sure not in Lublin.