It is a lovely apartment in a very nice area. The check in and out process was easy. Couple of things to consider though: depending on your luck you might be staying on the third floor and it is a bit of a climb, as there are no lifts. Perhaps clarify that from the start with the host, if that is important to you.
Apartments are very badly soundproofed and you can hear everything that is going on in the corridor and with your neighbors. There are not a lot of them, so that didn't bother us so much.
There is a boiler in the bedroom which makes quite a noise and switches off for the night. This makes it possible to sleep but can make it uncomfortable during the winter months. There were no extra blankets and it was quite cold under the thin duvets at times.
When we stayed there there was no soap in the bathroom so clarify with the host what is and isn't available.
Due to our circumstances all of the above didn't bother us that much and we will be looking into booking this apartment in the future.