As Carolina says, great location in the middle of one of Barcelona's old, central districts. It can be a bit noisy, especially when Barcelona wins... And the staircase up to the apartment is narrow. But, location, location.
The apartment itself was well set up, clean and comfortable. We enjoyed ourselves here: it was good for the two of us.
Carolina was a great host, with lots of useful stuff in the fridge, some easy reading material, and lots of material about Barcelona.