We had a great stay at Alex's place in Poble Sec last week. The apartment was great for a group of 3. The check in process was easy and we were even allowed early check in, as no one was staying the night before us.
The location was excellent. Lots of tapas restaurants and bars within walking distance. Definitely outside of the primary tourist area (which we enjoyed!), but easily accessible to the metro. Apartment was clean and comfortable. We would definitely stay here again!