The location is great. It's just a few minutes walk from the Train Station (less than 10 minutes without bags, longer with) and super close to the historical street with all the pizzerias. The apartment was also beautifully decorated and made me feel very comfortable after coming back from a day of sight seeting. We appreciated the sunroof in one of the bedrooms that had digitally controlled blinds.
Fabrizia was also a really great help throughout our stay. She was very responsive in the lead up to the stay, and she also helped us book a private transfer from Positano back to Naples. It required a lot of back and forth throughout the day as our plans changed, but she always responded within minutes to help us.
The top two things to note. As others have mentioned, the two bathrooms share a high wall that is not closed at the top. You can hear everything happening in the other bathroom. Also, you have to keep the door between the bathroom and the bedroom closed, or discussion in the bedroom will go into the other room. We found this pretty awkward, but managed by staggering when we used the bathroom.
The other thing to note are the stairs. It's about 3 flights. Even without a suitcase, it takes a minute or two to walk up. But we managed with no problems.