Sergios apartment is very clean, and has everything you need for a stay in Naples. Best of all: it is absolutely the perfect place for getting around in the town. You are only 5' from the underground, a bus stop just around the corner, and also the train to Pompei and the Amalfi coast is only 5' around the corner. I couldn't imagine a better place in Napoli to be for traveling around.
Sergio himself was very very helpful and did provide all what I needed. Thanks again and I will definitively come again to this place.