The first thing I must say that the location of this flat is amazing! We walked everywhere really everywhere, just middle of the city center.
Before to go Barcelona I was worry about the reviews bec. some people mentioned about the noise in flat at nights, but we slept really comfortable, there was no any noise inside.
Very clean, its smells detergent when you enter.
There is just one issue, the air conditioner was not enough. It was very cold at the beginning, in second day was better but was still cold inside. They need to find a solution to it.