The apartment is the same as described. It is clean, big and with well-equipped kitchen. Lotte is nice and she responses quickly if you have any questions.
Also, it is really close to public transportation so it is convenient to airport and tourist attraction. There is also large supermarkets nearby. It is easy for you to get anything you need.
As described, there is no elevator and the house is on 3rd floor. Just be aware that the stair is a bit steep. It will be hard if you carry heavy baggage.
Overall, it is highly recommend :)