Hey! I'm in the first year class at UF, and long time lurker who finally made a profile solely to answer this question!
The interview is 45-50 minutes, three interviewers- unsure if it was open or closed file because they asked me to list out my experiences and asked me questions that were in my packet, however I think they mentioned one person had read my file and two hadn't but don't quote me on that.
Everyone is super friendly, one person will be a 3rd or 4th year student and one is faculty, and another is usually a community veterinarian or other faculty. For instance, I had a Large Animal DVM, a PhD researcher on faculty, and a 3rd year student. The questions range from "tell me about your veterinary experience" to "how would you deal with the iguana problem" and everything in between. Check out the page on SDN with interview questions- just google UF CVM SDN interview and you should find it.
Last year it was interview, tour, and then an evening Q&A session but I heard this year they are changing up how it is run so I'm not sure what's going on during the day!
Let me know if you have any more questions and best of luck!