I knew the topics of the questions ahead of time based on the letter they sent me, so I thought about what I would say. I also thought of some questions to ask the interviewers.
What impressed you positively?
The students maintain that Iowa is THE best place to go for medical school. The examination rooms that could potentially become the sight for patient interaction testing.
What impressed you negatively?
Nothing
What did you wish you had known ahead of time?
If you get an interview, your chances of getting in are about 50% regardless of residency status--residents and non-residents are considered in separate pools.