As many have mentioned already this cool flat comes with an amazing view over the city and the sea - the rooftop is a great place for slow mornings and calming evenings, for enjoying pastel de natas from the bakery downstairs, a beer or coffee & cigarettes.
Alan is a great host, an easy going and open minded person who's not pressuring any conversations but who's always up for a good talk - the perfect balance for a good flatmate. I enjoyed interesting chats about his work as a DJ and how Lissabon animates him to devote himself to his ideas and plans, I really liked having those in between talks even though of my short stay.
I didn't miss or disliked anything in the accomodation, it was clean and felt very homey with the shared kitchen and living room opening up the space for gathering around, get to know about your other flatmates and sharing experiences of the day or life.
In general, Rua da Lapa is a great place to stay during your Lisbon experience, very central, a 20 min walk to the ocean while passing cute alleys or just to stroll around, also flattering when it comes to public transportation. There's no need to mention the stairs - it's manageable and worth every step.