Stay here!!! The 5th level (no elevator) really only means you can have that extra glass of wine or second slice of pizza, and not feel too guilty :-).
The place was adorable, spotless, bed and pillows so comfy!, great shower, and she threw in so many other extras.... perfect location close to so many sites, and 16 minutes to the train station - walking with luggage. Communication instant.
Highly recommend staying with Ari for your Rome visit!!