Reiner is a super host, very responsive and polite. Also he helped a lot with our luggage during the check-in. At first time stairs seem crazy but it's dutch! Reiner made his best to make the check-in smooth and comfortable for us.
The apartment is clean and cozy with private roof terrace. The view from it is beautiful. Also you can watch sunsets from it or have dinner.
We were staying during one month in Reiner's apartment and everything was good.
The apartment is located on the street with the market (Albert Cyup), so it was quite noisy there with the windows open. The market starts at about 7 am and ends at 8 pm. at these time it is especially noisy, but if you close the windows, then I think that this will not be a big problem.
I can recommend this place, especially good for short trips.
Just keep in mind that the apartment is located on the top floor and the steps may seem steep.