We stayed at José's for 4 nights and everything was fine. The apartment is located in the Alfama district and it is easy to reach the city centre (about 15 mins with the underground). The only thing about the location is that it is not in a touristic place, so people were looking at us continuously and we were a little bit scared, especially at night. Fair to say that it was probably just our impression, since in the end nothing happened.
The apartment was clean; we shared the bathroom with other guests, but this was definitely not a problem. When we arrived José waited for us for about an hour, since our plane was late. He was very kind and helpful. He suggested us what to do in the next days to visit Lisbon. He also told us that we could leave the luggages in the apartment during the last day after the check-out and this made easier our visit.
Overall, we had a very good experience and we would definitely reccomend the apartment and the host.