If arriving by train the room is conveniently located but you need to walk through some rough looking neighbourhood. We had no problems but did not go out after dark. The unit is clean and tidy with small fridge and cooktop complete with pots, pans and some condiments.The host responded to our messages quickly and clearly and we were able to drop our bags off in the morning and go out for the day returning in the vening.
You need to sort your packing on the floor as bags are not allowed on the bed and there is not other suitable surface other than the floor. The shower is very small and it is a challenge, lucky we are not overweight.
The room is lockable but someone went into our room whilst we were out and moved our stuff, presumably the host or representative but nobody mentioned anything to us about going into the room.
The tiny lift is a coin operated device (a first for us) but it also has a timer and if you are not ready to close the door and press the floor button within 15 seconds you loose your coin and the lift goes nowhere, so make sure you put all your bags in first, then get in yourself and make sure nothing is in front of the doorway and then put the coin in and press the button.
For us the WiFi connected but was so slow we ended up not using it.
Overall, the place is very nice once you get inside and get checked-in. The room was clean and reasonable size and we consider it fair value for money. If staying in Naples again we would consider staying here.