This location is excellent! You have a prominent metro station one street over which makes getting to and from the airport extremely easy. You also have a great view of the back of Casa Batllo which is fun. Stay U-Nique was very welcoming and provided us with snacks and water upon arrival. It was a very comfortable place to stay.
We did have an issue with the washing machine. We did a load of laundry that stained all our clothes grey with black marks. Unfortunately, our clothes were ruined but thankfully it was a smaller load and nothing "important" was in the load.
We would definitely stay here again, I just would not use the washing machine.