The apartment perfectly suites for big companies (there were 5 of us). Located in the historical center of Naples, which is great only if you don't have a car, as this is a ZTL zone, which means that you will get a fine (50-100 euros, no exact figures found), if you drive into it. In case you do want/need to enter this zone, you need to park on special ZTL parkings, that are quite expensive, from 20 euros for 12h (small car).
This apartment is nice, but a couple of remarks/suggestions:
1. Cleanliness should be improved, as floors, showers, kitchen and fans.
2. We were staying in this ap. at the end of August and it was really hot inside. If conditioners can be installed, it would really help.