Via Vittoria is an excellent location, close to the Metro station "Spagna" and only a few steps from the lively Pizza del Populo. The apartment has no lift but the very helpful host Federico will assist with luggage and will also store your luggage on the ground floor on your last day. Federico provided milk, sugar, tea, coffee (Nespresso) along with butter, jam and biscuits for breakfast - there is a Carrefour supermarket next door (open 24/7), which all adds to the convenience of this excellent, clean, comfortable apartment in the centre of Rome. Federico will also arrange a transfer to and from the airport - if your party is three or more, this will be better value than the train. Federico is keen to offer help and advice about Rome and its highlights - local places to visit, restaurants, etc - all very helpful, even to regular visitors to this wonderful city.
Highly recommended.