Monse was a wonderful hostess- and so flexible, meeting us later since we did not catch the airport bus. She also kindly helped book a taxi for dinner and also for our return airport flight.
The apartment is located in a perfect location in the old town, just feet away from some of the best Pintxos bars (Bar Nestor, Bar Zeruka, etc). You enter through a main door and up one flight of stairs to get to the apartment. The door opens up into a little hallway that has a private laundry facility on one end and then two apartment doors. We were in the one on the left.
The apartment itself was perfection- absolutely spotless and it had a wonderful "Happy organic modern" decor that had plentiful useful and well thought out storage. The bathroom was very clean and there is a kitchenette stocked with all that you'd need.
One recommendation if you're staying on a Friday night, the apartment is located also right across from a little bar/club so there are some loiterers that are loud well into the wee hours of the morning. I'd recommend bringing earplugs in case this happens (just happened one night but otherwise was fine).
Would love to stay here again and I highly recommend!