One word, Fantastic! We got taken aback when we first got there as this is part of the Spanish Quarter in Naples. However, once up the stairs the apartment was a real surprise. It is completely renovated, modern and fully stocked. Our hosts left us some fruit, fresh pastries and all the other basics we needed. There was nothing to fault at all.
The location was also amazing. With a 200m walk, you could be on the main street of Naples while still having the Spanish Quarter feel. There are numerous bars and restaurants all around. These bars and restaurants cost 1/2 the price of what you would pay in other cities. 1 Euro for a spritz!!! Don't forget to try Trattoria Nennella.
Staying at Antonio's gave us the opportunity to experience the old and characteristic side of Naples and this is what you need to see. Highly recommend this place!
Just be careful of the speeding scooters around every corner :)