Okay, first and foremost, make a reservation if you plan to eat there for dinner. They only take 50 customers and we saw them turn many away. We didn't have a reservation, but we did end up getting a table by chance. Please don't try this because you probably won't get a table.
A lot of great options to choose from that are different from what you typically get in Barcelona. We had rabbit, calamari, bread, hamburger, and 2 desserts to share. Also had mojitos- very good. We didn't get the €18 deal that everyone talks about here and we still only paid €48-ish total including our 4 mojitos.
Friendly staff. They are definitely busy, but still courteous. The owner (I think he was) was very apologetic about the no dinner reservations=no table policy and so we weren't even upset when we found out we weren't getting a table. Maybe some signage would be good, though. He also spoke perfect English. We were able to order in English as well (bonus).
A little out of the way, but not bad. Worth the walk.
A nice chance to the typical food if you're tired of Tapas and don't want to break the bank with a nice meal.