It was a bit annoying that the boiler was filling up during long period of times which made an annoying sound while we were asleep. Plus the water in the shower was cold within 3 minutes. Lastly, we also thought it was a bit odd that the majority of the lights were not working and our host simply told us : but that is okay, while we thought it makes sense to ensure all those little things are working when customers arrive.
For the rest we had a great stay in the old district of Lisbon and the host was kind to us and responded to messages fast. Thanks!!