Overall, we had a good stay!
The pros: very close to Garibaldi Square and Napoli Centrale, so if you're stopping in on the way to somewhere else (like us, in the way to Sorrento Peninsula), it's convenient and a good value. Angelo was friendly, and answered questions as they came up. The place itself was as advertised, in many ways like a hotel room, with an A/C (needed in Napoli during summer), and a nice bathroom/clean shower.
Things to consider: the neighborhood itself isn't the most conveniently located to Napoli's food or cultural sites, so you will do a fair bit of walking or using public transport to get around if you're trying to explore. We didn't think walking around the busy street at night was too sketchy, but people with families may think twice due to the surrounding neighborhoods.
Overall: solid and safe stay for our single night in Napoli, travelling on a budget. Thanks Angelo!