Gabriel’s place is absolutely amazing and he is beyond helpful! If you want to be among the locals this is the place for you! The location is about a 20 minute walk to the Colosseum and otherwise a bus or taxi is required to get to the sites. I recommend downloading the free now app for taxi service and figure out how to take the public bus to get around. Otherwise you will struggle with transportation from the apartment into the historical areas.
Gabriele is the best host.