Claudio is a great host. He responds really quickly to messages and happily waited for us when our train was delayed. He gave us useful information on the local area with recommendations for places to eat and drink.
The apartment is large with really high ceilings. The bed was comfortable and very clean. The bathroom is particularly nice and well appointed with a really large shower. There is no sofa or sitting area but there is a table and chairs in the kitchen area that you could use instead.
The apartment is just off Corso Umberto which is a very noisy street. So much so the host provides ear plugs! It's also quite a walk to all of the major sights on the Napoli tour. The local area is not the best as it's very close to the main train station. Someone tried to steal my wife's bag as we walked to the apartment. We may have been unlucky but it started things badly for us and coloured our view of Napoli. The Duomo is 15 minutes away and just up from there are Via Tribunali and Spaccanapoli which are really interesting streets and a great place for pizza, pasta and aperitivo.
If I could pick up the apartment and put it in another area I would stay there again tomorrow but I don't think I will be visiting Napoli again. Compared to Venezia and Firenze it just wasn't for us.