I will start with the good things - the location is really great and the bed is comfortable. It was also not as loud as I thought it will be according to the reviews. If that’s all you need - you can definitely stay in this flat.
Now to the not so good things.
1. Since it’s an agency rent, you have to pick up the keys from their office. When I picked up mine, one of the agency workers called me half an hour later saying they forgot to give me another pair of keys “for another door”. Well, okay. They made me stay in the middle of the random street for 15 min to bring me the missing keys. Guess what? I didn’t need those keys. Never used them.
2. Cleanness. Our hand towels had dry pieces of food on them, our bedsheets had bloodstains on them. Nothing tragic but pretty unpleasant. The shower had a few mold stains and was generally unwelcoming. Also, if you’re planning to shower after each other - don’t. There is only enough hot water for one person before it hits up again.
To conclude: I won’t be staying in this flat again, but this flat also hasn’t ruined my Barcelona experience.