A couple of friends and me arrived at Napoli early in the morning, and were in contact with Claudio during the trip via texts and emails. We had a lot of luggage, so we asked Claudio if he knew any place we can store the luggage (check-in was at 3 and it was 9 am..). He was very accommodating and friendly, and allowed us to can keep it on the stairs in front of the appartment, and to check in a bit earlier.
Overall the stay was amazing, the appartment was big, with huge windows, a very nice decor, and everything included (towels, some basic condiments, a coffee machine, a dishwasher..), and everything was at walking distance. Claudio was available by phone at both times we needed some help with the outside door and wifi, and answered quickly. Plus, he speaks very good English and French, which definitely helped with communication. We would definitely come back again!