My stay at Jacopo's place was very good! The room is just as on pictures, very suitable for one person. Experience of staying at the place was good as well: Jacopo is a very pleasant host. He met me at the place, gave the keys and gave an advice on what's nearby. Also he made a list of places to visit in accordance to my preferences, which is awesome!
The apartment is located very close to the center, so I almost didn't use the public transportation and went everywhere by feet.
I highly recommend Jacopo's place for a good stay in the center of Barcelona.