We were staying in this apartment in May 2014 for 5 nights. Apartment was conveniently located for our needs - close to the train station (we booked 2 tours that were starting at the station). It is located in the hear of the San Lorenzo market, so it's a busy spot, pretty noisy, but the apartment that we had was facing an opposite site so we avoided all the noise. The apartment is on the 5th floor so it was pretty hard to go up with the luggage, wouldn't be good for older people. The building is not in the best condition, but everything was working.
It is not the prettiest place in the city, but very convenient one, 5 min walking to main attractions (Duomo, Academia etc).
We didn't use the second floor because the stairs were not very comfortable. It would be nice to have some kind of commode or closet on the first floor, but not much room there. Kitchen has basic appliances, would be a good addition to have a kettle and a toster. There is a coffee machine in the common area (there are 2 more apartments that share the same hallway), coffee cost 0.60 EUR. Bathroom is small, working well, no problem with the hot water or water pressure. There was a fan in the bathroom which was a nice surprise. Would be nice to have some shelves and hooks in the shower, it looks like they were there, but were removed, probably broken.
WiFi was working well, good speed.
Communication with Enrico was pretty good over the phone, never met him personally though.
Overall, the price for the quality is ok.