I would definitely recommend this flat to a couple looking to stay in Naples. You can easily walk down to Chiaia (lots of steps) or get the Funicular (€1.50) up to Vomero.
There are also quite a few steps into the property too so bare in mind.
Flat itself is very recently refurbished and extremely clean. There is a balcony which doesn’t actually have a sea view, but is a nice spot to sit and have a drink.
The hosts were very accommodating and welcomed us with a bottle of wine and also had water ready in the fridge which was much needed in the heat.