The flat is beautifully decorated - i liked it a lot. Further, it has just been renovated so everything is new and it still smells of paint. The downside is that is on 5th floor (over 100 steps) and no lift. However, it recompense with beautiful view.
The location is fine as well if you like walking...it takes about 25min to Napoli Centrale and around 40min to sea front. I found the location a bit overwhelming - it is not touristy area as such so you get a real Napoli feels.
The communication with Claudia was a bit limited due to the language barrier, but check in process was fine.