Guglielmo’s place is in the heart of Campo Di Fiori and is walking distance (15-30 mins max) to almost all the main tourist attractions of Rome (Pantheon, Trevi Fountain, Vatican City, and Spanish Steps). It’s a bit further from the Colosseum, the Forum, and Palatine Hill but a quick 15 minute taxi ride can fix that. It’s also steps away from Campo Di Fiori’s farmer’s market, local restaurants, cafes, and wine bars.
There’s plenty of space for two people in the apartment, a small bathroom/shower (I’m 6’2, but it was fine for my girlfriend who’s 5’3), and a lovely kitchenette and comfortable bed/sofa with plenty of windows. We stayed here for 6 days and had no issues. We highly recommend Guglielmo’s place for anyone looking to stay in Rome.