I stayed at Chaira and Ciro's flat for two nights. I was greeted by Chiara's mother, who showed me around the flat and gave me the keys (we had pre-arranged this with Chiara and Ciro well in advance). I met Chiara and Ciro later that day, and they are both very nice; they own the apartment next door too, so are on hand if anything is needed/goes wrong (though nothing did for me!). Chiara and Ciro had provided me with a map of Naples with some recommendations for dinner; there are also some information leaflets on nearby attractions (and a few more now hopefully, as I donated my maps of Oplontis and Herculaneum to the collection!), which were very helpful in planning my visit.
The flat is about a 15-20 minute walk from Napoli Centrale, but it is an easy walk through the streets. It is in a lovely little location, set in a gated block of 4-5 flats and is on the 2nd floor. It is close to piazzas, the basilica of Santa Chiara and shops, and also about a 15 minute walk to get to the ferry port.
The flat itself is perfect for one person or a couple. The lower floor is a kitchen/dining area, with cooker, fridge, sink, washing machine, table and chairs, hi-fi system and cupboards (Chiara and Ciro had provided a large bottle of chilled water, milk, some breakfast pastries and a few other supplies, which was extremely kind of them!). The upstairs (which you reach by climbing a sloped ladder) is a double bed with two wardrobes, a chest of drawers and a small bathroom with toilet, sink and shower. In the apartment, everything worked as expected and was very clean. The WiFi connection there is not bad - it took some time for my phone to find it, but I got it eventually (that's probably more to do with my phone though).
Overall, the apartment was perfect for my stay, the hosts were lovely and I would definitely stay here again when visiting Naples. Thank you!