Prince of Wales Hospital is the major teaching hospital for CUHK, Queen Mary's Hospital is the major teaching hospital for HKU~
From what I've heard, the teaching is good at both hospitals. Gen med (esp gastro and cardio), gen surg (esp upper and lower gi), neurosurg and O&T have been getting good reviews at Prince of Wales...
Queen Mary's famous for their liver transplant surgeries~~
You blend in with the local students and follow their rotations and all teaching is done in english, so there should be no prob with communication.
I heard that both unis provide accomodation (limited) but the hostel at HKU doesn't have a nice reputation lol
Apply early for both!