This is the perfect studio apartment for two people when you want to stay incredibly close to everything. There is a bar on the ground floor close by that played music at night (we stayed fri-sun) but we were not bothered by the sound at all. We used the window towards the quiet back yard to air out at night. The apartment is small but has everything you need. You have to climb two flights of stairs from the street to the apartment that are narrow and steep so I would not book if you are using crutches or have trouble walking.
The bed was super nice and comfortable, the bathroom a bit tiny but fully functional and perfectly suitable for a two-night stay. Joachim was very friendly and accomodating and I would not hesitate to book his place once more.