This would have been a great stay under normal circumstances. Great location and accommodations. Honestly, this would be a 5-star review if our stay was 1 day shorter.
One day before we left, a water leak happened in the building. I believe this was a building issue, not a problem with the place. There was a constant flow of water through the ceiling into the kitchen/laundry room where it sat and seemed to be leaking into the downstairs neighbor's apartment.
We mopped it, found a large (maybe 20 L) vase that we used as a bucket, and collected then dumped water periodically. We shut off the water, and we talked to and tried to solve the issue with neighbors for nearly 4 hours before the host came to work on the problem.
We left after he arrived, and when we returned the leak had stopped and we were told the leak was fixed. Later that night, the leak started again. It was a constant small stream from the ceiling. We emptied the vase every 45 minutes/hour overnight. We had the cut water off again as the host had turned it back on, and missed sleep and showers. We had to ask for a discount, received 10% off of our 3-night stay, and had to get AirBnB involved to make that night free.
I would have expected a better response. Whether that be a proactive discount or moving us for the final night. Also, a faster response time would have helped. I felt like we had to act out of scope; we canceled plans to work with neighbors to get the leak stopped, and we spent hours trying to reduce the amount of damage the leak was causing.
With all that being said, check-in was easy, the location was great, and if it weren't flooding, the place would have been great. If something goes wrong though, I wouldn't expect a prompt or satisfactory response.