1. The flat is spacious and stylish. It has wonderful terrace. Enough space for 4 people.
2. It was perfectly clean and prepared for guests. Communication with the host was fine and quick.
3. There were some complains in comments about noise from neighbors. We did not have any troubles with it, but if you worry about it, probably you should chose another city to visit. Barcelona is always busy and loud.
4. There is an air conditioner in the flat, it was really useful.
Everything was fine and I can only recommend the place.