We really liked Luís's place as its location was great and as he is a really nice guy.
However, as the flat is in the basement, we had the impression that it is a bit damp as there is only one window which does not let alot of fresh air in and it was rather cold when we arrived. After we started to use the air conditioner to heat the flat, the flat didn't feel as damp as in the beginning.
If you plan to stay with someone you are not as close with, you might want to reconsider the flat as one can hear everything from the bathroom. Apart from that, we really enjoyed our stay at this flat.