First, the city is very suitable for an Erasmus. It is next to Bologna but has much cheaper rentals. On the other hand, it is a medium-sized city, so you will not have great distances or get lost in its vastness.
Regarding the university itself, the bureaucratic issue is quite important, to the chaos that is usually the Italian bureaucracy. I had no problem for the Learning Agreement, to change my subjects. Of course, the final schedules are not out until almost when the semester begins, hence you have to vary the LA several times, to balance everything. As a detail, it is one of the few Italian universities without a dining room. The rest of the facilities are pretty good. As a detail for people who, like me, do History, it is one of the very few Italian Universities more specialized in Contemporary History than in Ancient History.