Staying at Roger's place was the highlight of my Barcelona trip! He is a wonderful host - interesting, very sympatico (as the Italians say), helpful with directions and local suggestions, and even spoilt me with a delicious breakfast every morning. We had great conversations, even though they had to be in my poor French, as it was the only language we had enough in common to discuss interesting topics.
The room was perfect - spacious, beautifully fitted out and decorated, and on a quiet back street in the middle of the fabulous Vila de Gracia area, with luxury houses, fabulous restaurants and only a 5 min walk to the Gaudi houses. I highly recommend you to stay with Roger, and if you are that lucky I'm sure you will be very happy you did too!