I would highly recommend staying with Alessandra. The location is amazing - a 15 minute tram ride to the center, and I felt very safe in the neighborhood coming back to the apartment at night (which is a must for solo travelers!). Alessandra and her husband were so incredibly welcoming and helpful with all of their tips on what to do over my stay in Rome. Everything was just as described, and I thoroughly enjoyed their company. I will definitely contact them again if I return to Rome!