Look through these boards; no one can give you a concrete answer. Lublin goes through HMI, an agent; it doesn't seem that any agent ever gets any praise around here. European programs are not aimed at getting you back to the US, per se, and the Caribbean may help prepare you better for USMLE.
You need to do a lot more research on this for yourself; I see you make a thread in every school's forum asking "which school is better," or "which school is for me?" Only you can answer this; if you want to get back to the US fast, with a guarantee (as close to it as is possible) that you'll be doing clinicals somewhere in the States, than the Carib. is your choice. If you'd rather live in Europe for 4-6 years, go there.
Read around here, there's more than enough info to give you a general idea of what you'd be getting into if you go to Poland.