Very good value for money.
Excellent location - very easy to get to everywhere weer wanted to go to, including Camp Nou, which we walked to in 20 minutes. Lots of little shops and cafes and lovely bakeries within a few minutes walk from the apartment.
Great communication with our host in the days leading up to arrival. We were grateful to be allowed to check in a few hours early so they weer didn't have to drag our luggage around Barcelona after our early flight.
The apartment is good value and very comfortable. It is quite basic (eg kitchen facilities, bathroom) and was quite cold until the electric heaters had warmed up the apartment each evening (it took approx an hour to warm each room).
Unfortunately the apartment block was noisy at night, with an extremely loud barking dog after midnight, and neighbours having a very loud argument late one night. This kept the adults up and woke our children up both nights, which was frustrating. Apart from that, it was a very nice apartment in a great location, with a very good host. Excellent value for money.