Leopoldo was a great host to us, providing prompt responses and local advice.
The apartment itself is very nice and clean. The walls are a bit thin, but the the biggest issue we found, was the area in which it is located. While close to the central station and the old town, the apartment is also in close vicinity to Garibaldi square, which is known for pickpockets and the whole neighborhood had a very trashy feel about. We did not have any problem, but I would advise people to arrive during the day and not avoid late check-ins.
Also, keep in mind that it is on the 4th floor of an old building and while the apartment is renovated and new, the rest of the building looks like an abandoned WW2 bunker. This is not the fault of Leopoldo, but good to keep in mind during check-in as we did not expect it.