This apartment is perfectly located if you want to be in walking distance of everything in old Naples. Via Tribunali and Spaccanapoli were steps away. The apartment is very spacious and the living room/dining room were family friendly. I can't overemphasize how nice the space is - there was plenty of room for two families with three kids to move about. The roof deck is beautiful, with a very close view of Santi Apostoli which is also only steps away. The kitchen was well equipped with everything we needed for meals and the beds were generally comfortable, although one was VERY firm. Note there are no bathtubs for kiddos and the bathrooms are a bit small with limited space to put bathroom things - but the other rooms are so big this is not a big deal - and our littlest tot got a bath in the big laundry sink.
Now, with regard to the stairs. This was a big concern before we got there so I'd like to add some color that would have helped us. The stairs are wide and pretty gradual. They are well lit with several landings, including a locked landing at the top. Getting luggage in and out was not a problem as there is a nice locked courtyard at the bottom of the stairs and there was room to unload on the street. The stairs actually open up to the courtyard with several open windows looking down. But to enjoy all the great things this apartment has to offer (5-star space, location, amenities, cleanliness, views), you must be able to climb 88 stairs - meaning this is not for people with bad knees, bad hips or health conditions. I didn't have a problem carrying backpacks and sometimes two kids at the same time to the top, a trip which would take about 2-3 minutes. Nor was it a problem for me to go up and down several times. But we reflected that our 70-year old parents would have had a harder time, especially hauling their luggage to the top.
All in all this is a great place to stay and I'd highly recommend it for location, SPACE, modern convenience in a very old part of town, views from all the windows and roof deck and amenities.