This is an apartment in an old city quarter, right above Alfama. The apartment is clean an reasonably comfortable, but don’t expect a palace. If you are not used to anything but the complete silence at night, you will hear trams, neighborhood dogs and cars passing by, but this is the part of the experience. The alley is busy with local characters and people tending their businesses, but they are all cool, no issues. There is a lot of online noise about petty crime in Lisbon, but vast majority of it, !like in most of large European cities is perpetrated by gangs of Roma kids that are coming from the Balkans.
Bohdan is very correct and will respond quickly or help if you have any issues or questions.