First the good: My husband and I found that Mireia's flat was in the best location for us. It's a few blocks from a transfer metro stop that has access to just about everything. Easy to get to the Ramblas or even Camp Nou. The flat also has great restaurants and cocktail bars just around the corner. The flat itself was a good size and had a lot of natural light. The building does have an elevator which is great since the flat is on an upper floor.
The not so good: When we arrived to the flat in the evening, we found that there was just a half roll of toilet paper in the bathroom. We searched the entire apartment, but to no avail. I messaged Mireia on the Airbnb app about where we could find some (maybe we weren't looking in the right place?) and by the next morning had to buy our own since we never received a response. This was concerning since if anything else were to go wrong, we weren't sure if we'd get a response about that either. Additionally, there is a kitchen for use, but it is missing many kitchen basics like oil, salt, pepper, etc. We also had to do some searching for dish soap and extra paper towels. We also found the apartment to be "lived-in," with many things being a little dingy.
Overall, a decent stay if you aren't looking for a place to do a lot of cooking or hotel quality living.