Highly recommended. I will definitely stay at Blue House if I come to Lisbon again.
The location is very close the one of the greatest marketplace and food court in Lisbon. The restaurants and the bars near the flat open until 0 or later.
I could get to the riverside in 5 min. and the view was fantastic.
Actually, the river view from the house is very little, but it wasn't important to me.
Even though the house is the last floor, but some noise from the ceiling or the walls was heard at night a bit. It wasn't really bothering, but a normal level.