Convenience and practical comfort at a fair price, if one sets their expectations appropriately.
My wife and I stayed at Fabio's flat for 3 nights. The location is convenient - close to all the tourist spots in the old town, with several options to eat and for groceries within a kilometre radius. Fabio is a welcoming host. He personally met us at the check-in time and gave us a briefing about the surrounding area. He was also available to answer our questions on the phone.
The flat itself is clean and tidy, and we did not find anything to complain. There were only a few minor issues, if I were to nitpick; the shower stall is extremely compact and the flat gets stuffy if the window is kept closed for long. There is also no heating so it can get quite chilly in the winter. Both of these issues are perhaps due to the apartment being in an old building and are more than compensated for by the previously mentioned advantages.
Overall, I recommend the apartment for short-duration stays, for those not looking for luxury.