Riccardo's place is pretty much as advertised. It's right in the center of Bologna, I don't think you can get much closer to Piazza Majore. The apartment itself has a nice balcony facing North, I guess this is a good thing in the summer, as it can become quite hot in Italy.
The kitchen has an induction stove and a limited set of cutlery and dishes. If you are into cooking, make sure to bring your own knife.
The apartment is created in open space style, the only door is for the bathroom. If you are a party of four, keep in mind that you hear every beep of your friends. Also, the second bed is a fold out which gets in the way to the bathroom. Keep that in mind, if you plan to occupy the space with four people.
The apartment does not have a big comfy sofa to hang out. Its just that fold out sofa in front of the bathroom and balcony door. The kitchen table sits four people, though.
The master bed is inside an "outlook room" you can reach by climbing a pretty steep staircase. That room has windows to all sides.