Gunnar's place was beautiful (those tile floors, that amazing balcony and garden!) and the location was amazing--so close to everything without feeling like you're in a tourist trap. Transportation was easy (metro and bus nearby), check in was smooth (don't forget the tourist tax!), and communication with the host was prompt. We were a party of five adults and the flat was very spacious for us.
One thing to note:
Pro: the flat is next door to what seems like Barcelona's hottest night club.
Con: the flat is next door to what seems like Barcelona's hottest night club.
The walls are thin so sound carries (you can almost make out the neighbors' conversations) and the club gets pumping around 2am. Bring ear plugs or better yet, go join in on the fun!