I just got back from UHS. The interview is fairly relaxed. Very conversational. Read the interview feedback (it is under T for The University of ...). There is lots of good info there. Yes, there are ethical questions. I didn't really get any, but some of the other interviewees did. Enjoy the campus and good luck. I will be going there if I get in, assuming my wife doesn't veto the decision (which she has the option to do).
Good luck,
WannabeDO