Check your locks! Our room didn't lock and could be opened without swiping the key card! We were treated to this discovery when another resident walked into our room thinking it was theirs. We informed the desk multiple times and the issue was never fixed. We resorted to propping our suitcases in front of the door at night so we'd at least be woken up if someone came in. Pretty bad stuff!
The elevator isn't free in the mornings, it requires .10 to use. The price isn't the issue, more the inconvenience especially since as a tourist you might not have a lot of denominations of local currency yet.
The room was small, but nicely designed and clean. Bed was quite firm, which was okay for me but could be a dealbreaker to others. Hard to sleep on your side. The terrace was a nice touch, a great spot to have breakfast.
Breakfast was free, and tasty. A variety of pastries from local shops and espresso/cappuccino from the automatic machine.
Location is great, Vomero is a nice neighborhood with great food.
Ultimately, I can't recommend the hotel due to the lock issues, but if it weren't for that then I'd say it's a great value for the money.