Our hosts were kind and gracious. The flat itself was charming and had many retro design details.
Down to specifics:
The bed mattress was very comfortable. Sheets were soft. Towels were large, absorbent, and fluffy. The flat is a short 7-10 min walk from the train station, but if you arrive later at night (as I did) and you choose to taxi, it cost 6€.
This was a good choice.