Luis is a good and attentive host. His apartment is in a great location in the middle of Bairro Alto close to many restaurants. Metro stations are 15 minutes away from ten apartment. However, I had a few issues during my stay. Some of these were solved and some were not. First, I did not have hot water for the first two days because the gas ran out, I reported this to Luis and he came in 24 hours later to check it and change it. He apologised for this. Second, the apartment was incredibly cold throughout my stay, I reported this to Luis and he provided me with a smaller heater 24 hours later. I understand that I stayed during January, but I would have appreciated it if a heater was provided at the beginning of the stay without me having to ask for one since Luis said Lisbon gets cold during the winter. As you can see, Luis tried to help as much as possible, but these little problems made my stay unpleasant.
There were a couple of problems that were not solvable, one of which is mentioned by other reviews, the apartment is located opposite a school, so the noise level is really high when the children are on breaks between 8am and 6pm. There are also a couple of bars near the apartment, one of which is located at the bottom of the building, so they played music loudly between 7pm and 1am-2am. So I could hardly just relax during the day, only chance to do that was between 2am and 8am. The other issue was cleanliness, while the apartment was pretty clean, there were a few stains on some of the sheets, there was a bad odour in the apartment and I found a big cockroach in the bathroom.