I just attended an admitted students day so I can try to answer some of your questions! My biggest tip is ask as many questions as you can, especially if you get a chance to talk to current students. We asked the current students about places to live, the rigor of the program, how they are financially able to afford the program (there is very limited funding available) and they answered our questions honestly and openly so we were able to really gain an understanding of what it would be like to be in the program. Also if you have better offers from other schools, don't be afraid to bring that up to you program coordinator and ask if there are any additional opportunities for funding. Although the program didn't have any additional funding opportunities in terms of scholarships, they did have RA positions open that are paid. Additionally, get to know the other people there! They may be your classmates or even roommates in the future! Finally, go in with an open mind, enjoy the experience and remember, they admitted you because they want you there! Good luck!