From the metro station Martim Moniz, the map app sent us through unsafe streets full of drug addicts and drunk people (r. Sao Lourenço, r. Sao Pedro Martir). It was late at night (21h), so avoid these streets if it is already dark. There were cockroaches running around as soon as we entered the place. We contacted the host regarding this issue (with photo evidence) and they replied that there was nothing to do about it. I could not sleep well that night as I was afraid to find more cockroaches.
The place is well located, but some surrounding streets should really be avoided at night.