Millenn Hotel is close Bologna Centrale, and it took me about 20 mins walk to the old downtown. The hotel looks quite new, all the gears are really nice. The staffs are helpful and speak good English. Breakfast is great, lots of choices and delicious. WiFi access is fast and stable in the room.
However, although I booked a single room for two nights. The room is really small, or in other words, compact. For me the size is just ok, but it may not be that comfortable to someone else.