The guest house has a really great location, just 5 minutes walk to Belém Tower. You can reach the city center of Lisbon and some beaches at Cascais easily by public transport.
The flat was very clean, especially the shared rooms (kitchen, 2 bathrooms) were cleaned daily. They also really pay attention to little things like enough toilet paper, freshly washed hand towels, etc. I really appreciated the warmer blanked in our room, since we stayed in Lisbon in october and it can get a bit cold at night.
Communication with the host was a bit lacking at first - I asked some things a week prior to our stay (like will there be towels, etc.) and received no answer, sadly. But the day before we arrived, Helio texted me and the communication with him was very good.
Check-in and Check-out was really easy.
In summary, we had a very pleasant stay!