Clean and was quiet during our stay. Easy to access public transportation. Very nice common areas. Communication from host was very clear.
It's very near the touristy areas but not in them. Up a huge hill, which hosts warn about, but it's hard to avoid huge hills in Lisbon. Feels very safe during the day. I felt a little unsafe at night but my friend felt completely safe, so I think it might just depend how nervous a person you are.
Overall a very good choice and we have no regrets!