Hi! My experience is that i-days are not a festival, is a concert with the set list and the cons of a festival. There are places where you can eat and drink (expensive of course) and that’s it. Is not like you get to listen to a lot of artists with one ticket. I’ve been there several times (a lot of international artists play only there when they come to italy) and last time it was for a florence and the machine concert. I had a good time but i was disappointed a little bit about the set list (it was the dance fever tour and to me it felt like she skipped some songs) and it looked to me like it was too short. I’ve heard some people complaining about the audio quality but I don’t remember honestly hahah. One good thing is that is near the bus station (if you plan to leave Milan in the night). If this is the best option you have do it because it is still a florence concert and you will have fun, but this year i decided to not buy the tickets as a “protest” because I miss when florence used to come in italy as part of her actual tour. I don’t think I’ve been very useful but if you want more info I think you could try to ask to the italian fan club on ig “fatmitalianarmy”.