We stayed in the apartment for a long time and had little to none problems. The apartment is spacious, really well equipped, location is quite nice as it is close to all sights, outdoor areas and many lovely cafes. I'd say it looks not as shiny as on the photos, but overall is in decent condition and looks good. Note that the street right outside is quite busy so you will hear some noise from cars even at night. It was not a problem for us, but may be an issue for somebody looking for absolutely quiet apartment. Another thing to keep in mind is that there is a church nearby and they ring their bells really loudly every day around 8:30 AM so be prepared :)
The hosts were very nice and friendly, communication was easy and responses were prompt, they allowed really late check-in and quickly helped us with a small issue we had with the gas boiler which provides hot water and heating for the apartment.