Not recommended.
The good - the house is really nice and clean.
The bad -
The boiler supplies warm (not hot) water for one person at the time.
The area is bad. Not unsafe but looks like an ugly working class area, no decent restaurant or cafe anywhere within a short walking distance. Lisbon is an attractive city and it’s a shame not to enjoy it.
Check in is with a weird app. We normally like distant check-in but rather than a simple safe or lock with a code, all guests need to install an app with up-to-date OS which takes some time to work, create an account and be invited by the host. If your battery runs out you are stuck out.
The house is cold. The heaters are not enough.
The ugly - the host. We left after a few days due to works in a house nearby that made it hard to work from home. It took the host almost a day to reply and she went almost as far as questioning if we are not making it up since she is renting the nearby house and they are not bothered. No refund of course and no empathy at all. Not even “I’m sorry you need to move”. Nasty nasty person.