We had a nice stay at Ema's flat. The location is near a popular viewpoint so you get a lovely view from the flat.
There was a slight misunderstanding with the host as she asked to be notified 45 min before we arrive to the flat. We understood it was fine to check in slightly before 3pm but ended up waiting until 3. Not a big deal. We put that down to language barriers.
The flat smelled of damp throughout our stay and we kept the windows open during the day and sometimes at night too.
We didn't really sleep well as the upstairs neighbours were loud for the first two nights. Also, there is a lot of street noise which travels up because the flat is on a hill. We understand that it's due to the city's geography i.e. number of hills and will take this into account next time we're in Lisbon.