Claudio's place is really lovely and perfect for spending time in Trento and for surrounding cities. It's right on the edge of the historic area (with lots of restaurants, cafes, shopping, and historical sights) and very close (~5 min walk) to the train station. I was there in the summer, and had the AC and fan going, but thought it was very quiet. It also felt very safe. There is a heavy outer locked gate, the door to the apartment was heavy and locked well, and the apartment is on the top (3rd) floor. The apartment was extremely clean and well-decorated. Claudio was easy to communicate with and left some nice suggestions for restaurants and cafes.
The air conditioning was much appreciated and worked very well in the living room/kitchen/dining space, but didn't work well in cooling the bedroom or bathroom. There was a standing fan that I used to move the air to the bedroom, and also closed the shade on the bedroom skylight and shut the bathroom door. There were two clothes washers and a dryer in the basement, which was nice. However they were small compared to what I was used to and the dryer had to be run a long time to fully dry.
Overall, I would highly recommend this place to others! It's clean, safe, and has everything you would need.