just went through my AMCAS application and this website
What was the most difficult question?
none really ... everything was just about myself and my experiences (personal, research, extra-curriculars) Just be able to expand on your AMCAS application and you should be fine
The students seem so happy to be there. The school seems to have a lot of funds and there seem to be an incredible amount of opportunities to be involved in a wide range of activities
What impressed you negatively?
The residence is not the nicest of places ... then again it's really cheap so ...
What did you wish you had known ahead of time?
Nothing ... the tips from this website were useful ... wear comfortable shoes (the tour is long) and take the metro (it's so much cheaper than a cab and the station is right by the university) and it's not a bad idea to bring some warm pj's (my room was freezing in Olin)