I have spend at Bruno's 3 nights and I found apartment great. Before arrival we've got very detailed information how to get to the place (including 3 options with prices). It was indeed located within walking distance from center (~15min). There was supermarket and few pizzerias (a very good ones) and pharmacies nearby (up to 2min). The view from the windows was pleasant too.
The apartment located on 3rd (last) floor is small, but cosy and very well arranged. The furnitures, kichten equipment and bathroom equipment are well-quality and new. Of course it was clean too. The host himself is very nice, helpful and fast reacting. When the gas tank for heating oven has emptied, we had a new one within 15mins (including installation). The only Bruno's little flaw is the English. He has good reading/writing English, but poor speaking - but that's still far-far above average in Naples.
As a summary, I do really recommend Bruno's for Naples sightseeing or anything else.