We had 2x1 nights stays at Marcos place in the beginning and end of our vacation, and it was a smooth, relaxing and superfine experience. The place is beautiful, classy (better than the pictures) and very quite/very nice neighborhood even though it is very central/close to Termini. A quiet dinner at the beautiful balcony was just what we needed after an 10-hour drive!
Because of the short stay, we did not talk that much with Marco, but our impression is, that he is very friendly, helpful and accommodating.