My wife and I had a wonderful stay at Claudia's place. It rained a lot of the time that we were there so we ended up spending a lot of time in the apartment, but it was actually very nice as we needed a break and the apartment felt like a second home.
Claudia had kindly arranged a lot of little food items for us to enjoy during our stay. Because of the rain, we ended up eating one meal almost every day in the apartment, and the kitchen was well equipped for cooking.
The location was fantastic. Walking distance to both old Napoli and the castle up top. But also easy access to the funicular if you're not keen on walking uphill.
In short, I would highly recommend staying at Claudia's place if you get the chance.