Me and my friends spent 3 amazing days at Sergio's. He always replied to every questions I had and helped me the best I can for my stay.
The appartement was big, perfect for 8 people. It was also very clean and modern. We were at only 2 mins walking from the metro station and It is located in a pretty area.
I highly recommend this place and I will definetely go back there for my next trip to Barcelona!!