The place is quite stylish and small, but liveable for 1 person or a couple for a few nights. There are WiFi and washing machine, which are important. Can only have decent WiFi on the ground floor though, so can't lay down on bed and use WiFi.
The place is only 15 minutes away from Napoli centrale station. So it's quite good for travelling to pompeii or other nearby towns.
However, take note that there is no air conditioner and no microwave. Window is also facing the inside stairwell.
If you're okay with all of these, then you'll enjoy this place. It's quite reasonably priced too.