The apartment was okay! It was close walking distance to the good pizza restuarants, we recommend Di Matteo! It isn't too far to the train station which made it a great base for us to travel to Pompeii and Sorrento.
We did find that the cleanliness could have been better, the shower drain overflowed when we were showering, and there was some mould in the corners of the shower.
The pillows on the bed were a little lumpy so we did need to sleep without one of them.
Guglielmo was great at communicating and gave us good advice around taxis locally. The location seemed a little "shady" to us with a lot of strange people and yelling happening outside.
It was a good base though if you are planning to travel out of Naples!