I didn't have a chance to meet Luis but I met Tereza, what a lovely woman. She was very helpful and answered all my questions. There were 5 people in the total in the apartment and I had my own bedroom. There are also 2 toilets. Only 15mins walking to Baixa-chiado / Bairro alto and 10-15mins walking to Cais do Sodré train station. A lot of cafes and restaurants around. Just be aware as already advised, that the street is noisy during the day. It gets quiet usually after midnight. I knew that and didn't have any problem to sleep. I had a great time staying in the Luis' place. Thank you