We were a couple and a friend staying at Christian and Miguel's apartment for a little over a week. Overall it is comfortable and well furnished, some cupboards may need a little updating but nothing to flag. All the appliances worked and we did a few rounds of laundry, cooked, the heater for radiators worked marvellously (although note that the master shower hot water turned off half way through our stay, so we all needed to share the other shower for the remainder of the stay). You can also get lots of sunlight and there is plenty of communal space plus luggage space.
The biggest pro here was the location. The flat is incredibly located, with supermarkets, shops, pharmacy, restaurants, bars just a few minutes away.
Some notes for future tenants is the flat is on a low floor so you can hear everything outside and is most vibrant during weekends late at night. The walls and floors are also quite thin so we could also hear neighbours moving around, coming in and out. Sleeping-in wasn't an option for us and for our light sleeper, night time was stressful. Also the second bedroom doesn't have any windows and is significantly smaller than the master bedroom.