Diegos description is absolutely accurate and the apartment is as shown in the pictures. Everything was clean and Diego provided some things for breakfast, water, little things you need. He was a perfect host and helped us a lot with every question we had and with many tips he gave us. From a good restaurant to parking spots (he reserved one for us by waiting there in the rush hour, defending it from other cars. Awesome!).
So nothing to complain.
One thing about the location of the apartment that guests with cars should know. Nothing that Diego can change or that effects the qualitiy of the apartment!
The apartment is in a limited traffic zone (ZTL) that cars are not allowed to enter, if not registered. It is no problem, since you still can park 1 minute from the apartment, which is nothing for a central location like there. But if you enter the ZTL, the fine will be at least 80€ and you will be video taped. Turning around won't help. So beware.
Anyhow, a great apartment, the best we have seen on our two week trip though Italy. If we return to Bologna, we will come back to Diego.
Thanks for the experience!