The host is a very nice guy and very helpful to. Good communication (via google translate) and responsive to iMessages while we were in town. The flat itself was also lovely; comfy beds and very clean. Nice space in the kitchen to hang out too.
The location is good and central, the train station and the port are walkable, for trips to Capri and Pompei, which is why we picked this place.
The main problem is the noise however. The flat is on the 1st floor, so close to the noise, and it's a noisy city. I was expecting some noise, but I wasn't expecting to be woken up every night by noise from the street. Whether it be people shouting, or bin lorries reversing, or people revving their bikes up, it was a lot worse than I'd expect even with windows closed. And I wasn't going to bed before midnight either.

It's a nice flat and well located, but that is my only warning. if you like sleep on your holidays, it's a consideration.