Lisbon was such a lovely experience for us and we were very happy to stay at Rui's place considering the fantastic location and easy check-in/out process. The welcome gift of wine was a nice touch. It was a perfect studio size for myself and my husband and we were happy to come to the flat each night.
The shower does need some work as it currently isn't properly draining; however, hopefully this is a easy fix for Rui so you don't experience this. Also, there is definitely a noise factor to consider. We have a white noise app so it wasn't an issue for us but something for you to consider.
Overall, we enjoyed the stay and would be happy to stay again in the future.