Arryvo was the best hotel stay during our three week holiday. It is conveniently located fairly close to the train startion, a flat 15 minute walk to the hotel. The hotel is situated on the west side of the incredible historic centre, the Porta Napoli is just a few minutes away. The hotel is modern and new, the staff are welcoming and very accommodating. The rooms are very comfortable, clean and pleasantly appointed, including a large flat screen TV. The bar/seating area in the lobby is very comfortable and available at most hours where you can enjoy an Aperol spritz, or similar. Breakfast is sensational and one of the best I've had anywhere in Europe. Instead of the usual self-serve bar, the breakfast items are beautifully served a la carte and you can order as little or as much as you like. The orange juice is fresh-squeezed and cappuccino's are the best. I can't say enough good things about this hotel and highly recommend it.
Also, for an excellent restaurant, just a few minutes from the hotel, be sure to check out 63 Osteria Contemporanea located at Viale dell'Università 63, you will be impressed. A great stay in an incredible city.