The flat itself is nice and mostly kept clean, the location is ok and the host is moderately friendly, the only problem is that there are 6 other rooms in the flat (some of them double) and all of them are also rented separately on Airbnb, so at any one time you could be sharing with up to 9 or 10 people. You can imagine what that could mean as far as noise and sharing a single fridge, or even sometimes people leaving a mess in the kitchen or bathrooms.
It wasnt so bad though that it ruined my visit, overall it's a nice small room and the heating was important in winter so I enjoyed my stay here, but I won't come back here in my next visit to Lisbon.