Humberto was a wonderful host. My friend arrived in Rome quite a few hours before me and Humberto helped organise his transportation from the airport to his beautiful flat. His house was in a fantastic location walking distance to many of Rome's "must sees".
His flat was clean, had wifi, air conditioning and best of all a beautiful view of the Vatican (especially in the evening).
I would definitely recommend staying at Humberto's flat if you find yourself in Rome. :)