We stayed for 4 nights at alfredos apartment. It was very clean and had everything we needed. The apartment is very close to the bus stations, to supermarkets, cafes and restaurants. You could reach the colosseum in 20-25 minutes by foot. Alfredo is a great host, he gave us tips on where to go and how to get there and was very fast to respond to any of our questions. check in and check out were very flexible. Would definitely recommend staying an this place!