Overall, fantastic and beautiful apartment. Great, minimal style furnishings with plenty of space for our 2-person trip and spacious bathroom. No living room (think the 2nd bedroom is a convert).

The bathroom shower light was out, so only had one bulb, but that was fine. Building did construction our first night there turning off all the water, so we couldn't shower the next morning. We had to find out after messaging the host's cleaner on the app. It's fine, but we should have been given notice when we arrived and it was just those few morning/afternoon hours.

You can hear quite a bit of noise/people walking up/down the stairs, other apartment and piano/guitar from the people next door (one of the locked double doors is the neighbor's wall). They weren't disruptive, plus if you like some good "live" music, it's fine in the day/early evening hours.

Bed: comfortable and blankets sufficient.
Cleanliness: exceptionally clean and I loved it that way.
Heater: definitely works and apartment was comfortable the whole time.
Wifi: kind of slow and had to switch between their two networks, but it was fine. No big deal.
Washing machine: they provided detergent, but decided to not try and use the machine because it was all in German. Would be great to include instructions/labels in English.