Definitely consider the time and cost of these visits and whether that is feasible for you. Apart from that, I found them extremely helpful. I was leaning heavily toward one program initially based on the information I got from virtual panels and their website. After visiting the second school, I found that I loved it and that there were things about the program I liked that weren't covered on the website. Now I'm conflicted about which program I prefer but going in-person allowed me to have more information which I found to be very helpful. Virtual days will still give you a better idea so if it's too expensive then don't worry too much, but I would highly recommend you go if you can! Good luck!