yes, I'm an M1, and so far I'm very happy here. other people in this thread have brought up some of the things that make GU unique; there are probably others, but the fact is that you're going to find out a decent amount about the school on the actual interview day. You might find some things you really like, and you might find some things that rub you the wrong way. If they keep the interview day format similar to what I experienced last year, you'll have an accurate picture of the school before you go into the actual interview. By then, you should have some basic idea of how you like it and how you might (or might not) fit in.
Don't worry so much about the interview; try to relax and just be yourself. Of all the schools I visited, I found GU's atmosphere, student population, and curriculum to fit my personality and learning style very well. Some of the other people who interviewed with me that day agreed with me, while others weren't so sure. If you have specific questions I'll do my best to answer, but if you're just wondering how you'll like it....you just won't know until you visit.