Roberto and Susana's place was well located in the Born neighbourhood, close to major subway stations to get anywhere you want, and walking distance to lots of great restaurants and tourist destinations. Communication with the host was fantastic, and even though the apartment was shared, we basically felt like we had the place to ourselves, as the two rooms are very separate.
The place was very basic, with few homey touches. Unfortunately, we found the street noise to be very prominent, so the place was definitely not a great place for relaxing. It was definitely more of a crash pad than an oasis from the hustle and bustle of Barcelona. I recommend it for anyone going to Barcelona just to party, as the location is great for this, but it is definitely not for people looking for a quiet, relaxing stay.