The location is pretty good. The address in the description is not right though. The proper address you only receive after you have booked. I spent two nights at the apartment because I wanted to visit the biennale.
Pros:
_location is central
_bathroom is nice
_apartment is clean
_AC
Cons
_when you check in after 7pm you will be charged 35 Euros even when you address that issue long before your travel. Since your check in time is connected to your arrival time on the airport one should consider that.
_Sockets come off when unplug your devices.
_WLAN password didn't work
_Faucet in the kitchen is kinda lose
_toilet flush is lose.
_luggage can't be stored on your date of departure. When I asked "if that is possible" I just received a "no". A recommendation would have been nice like it is quite common.
All those cons are not really important for a nice stay though. The only thing that I really disliked was the fact that they charge you that much just for someone taking your call when you are in front of the door and pressing a button.