The little studio looks exactly like in the photos. Note that there is no doors between the toilet, showers and any other part of the flat. One is very exposed when showering or going to the toilet, so it is best to only share the flat if you are already past that stage with whoever you are traveling! :D But if needed Carel is happy to share another toilet downstairs to use when you have guests.
I thoroughly enjoyed my stay. The flat is very central, there are numerous restaurants and shops close by. Carel is a very friendly and caring housemate. I recommend wholeheartedly.
Careful: need to be able to climb very steep and high stairs to access to the location. But I guess this is the case for most appartments in Amsterdam!