Location. Location. Location. Easily accessible from the airport or rail station via public transportation. Approximately a 45 minute walk to the sites you may see only once and 15 minutes from the places you'll want to go to everyday for a coffee, meal, or cocktail.
Near silence at night for a restful sleep. You'd never think you are within a 5 minute walk to the buzz of Trastevere. For the nights you need off from eating out there is a fully equipped kitchen and multiple markets from which to stock up.
An outdoor balcony for morning coffee with a wonderful view of estate looking houses under a canopy of trees where parakeets squak is a daily pleasure.
Federico is available in a pinch and responds quickly. One specific situation was when I had issues with a ferry I was booking and he immediately called on my behalf then relayed to me what the issue was.
I will stay again most assuredly.