The city of Naples is very different compared to say London which is where I am from. You can expect busy roads and motorcycles driving down narrow streets where you'd expect only pedestrian traffic. But therein lies the heart and culture of the city of Naples and you'll encounter genuine Neopolitan people. Where we stayed in Giuseppe's place was near the station Toledo which is via the Metro on linea 1 (line 1). This I would describe as quite a busy shopping area of Naples. Our apartment was on the 3rd floor of a building down a side-street from the main road. The room we stayed in was Perfect and Clean! The host was very welcoming and recommended great places to eat! In fact, this place called Pizzeria 900 has hands down the best pizza I have had in my life! The margherita pizza was HUGE and it only cost 4Euro! Unbelievable!
Regarding location, you are close to the Metro toledo station which is good, tube travel is very cheap - about 1.10Euro to most places. You are also walking distance to the Port where you can catch ferry to nearby islands including procida, ischia, Capri etc.
After a day's activities, coming back to the apartment was very relaxing, comfortable and we had very comfortable sleep!