The flat was especially beautiful: freshly renovated (I think), clean, well furnished and decorated.
The photos actually feature another twin flat, "mirrored", and with only one difference I noticed (the ceiling lamp), so I'd say similar enough.
(It's actually a floor with mostly rented flats, so expect fellow travellers to wander around ;) )
The bed is super comfy, the street was quiet (only minor source of noise was from the boiler and the inside of the building) and the place was cosy and functional (couch with coffee table, small dining table with two chairs, minimally but efficiently equipped kitchen), as well as having a good and reliable Wifi.
The communication and service was very professional (clear check-in explanation with key in locker on the door, supply of fresh and folded towels, cleaned and tidy place, quick help with a heating problem after I arrived)
U6 and U4 stations are within walkable distance (~10mn)
In overall, a very good experience :)