The flat is consistent with the pictures on the site with a magnificent view on the Alfama and the Tage. It was clean and equipped when we arrived, however it would be definitely too small for 4 people. The upper floor gets extremely hot during the day which can make it hard to sleep : our solution was to use the AC before going to sleep,which worked pretty well for us.
The location of the flat is great, you are 2 mins away by foot from tram and bus stations taking you to other neighborhoods. The area is car free, but don't expect silence before midnight : There are many restaurants with Fado's singers around the flat and it remains a touristic area overall.
We were not specifically bothered by the smells in the bathroom as mentioned in other comments.