Ennio is an extremely friendly host! He explained everything about the house for us, and gave many useful advices on how to get around Rome. He has a wiki website for the sole purpose of explaining how everything around the house works, which I think was an incredible idea!
The house is big, and can fit many people in it, we were in a family of 5 and we had no problems whatsoever. Although it was a small challenge to get into the house due to the amount of luggage we were carrying and the amount of steps to get there. But even that wasn't a problem for us, Ennio was waiting for us at the train station and drove our luggages uphill. I would completely recommend this house and Ennio as a host if you are looking somewhere calm and cozy to stay in Rome as a big group.