Roberto's place is exactly as described in the ad.
Roberto and his wife were very welcoming on the first of my 10-day stay. If like me you like privacy and are worried about the fact that the studio is somehow embedded at the top of Roberto's home, let me reassure you: this is not a problem at all. I haven't seen Roberto and his wife more than twice during the whole stay, although he was very quick to answer to any query/request I had.
He very kindly offered to pick me up from the tube station when I arrived, and to drop me there on the last day, and allowed me a late check out at no extra cost. Next time I travel to London for work, I'll be sure to book this place if it is still available.