Alba and Carlos made us feel very welcome when we arrived, and were helpful hosts - easy to contact etc. It's a small flat, but has everything you need really - bed, sofabed, hobs, microwave, kettle, cupboard space, wardrobe. The flat was clean, and everything was in good condition. It's a nice area, but not very touristy - there is a local supermarket only 20 seconds walk away, a market selling fresh fish and meat etc, and the metro station is about 1 minute walk away. A handful of shops and restaurants around, but we didn't spend much time in this part of Barcelona. Very easy to get into the more central parts of Barcelona on the metro.
The one big problem is that all the walls and ceilings of the building appear to be very thin - you can hear almost word-for-word the conversations of people in other flats (which are all tourists as well, as far as we could tell), anyone moving up and down the stairs, and their music. This kept us up quite late on some nights. You can also smell everyone else's cooking, which is either a good or bad thing depending!