Nice appartment. We stayed with our two children (age 13 and 16) for 5 days. The wifi is good as they did not complain (fast enought for Netflix). The appartment is spacious and clean. Well equipped for breakfast and tea. And you may also prepare dinner, but we did not.
The location is better than expected: the streets surrounding are safe to walk also during the evening. Nearby (200 m) the metro, and near the ferry boats (we took one to Procida, very nice). We were welcomed with some explanations how the city works and with a map. The host was responsive to a few questions we had during our stay. We can recommend.