We had a wonderful experience at Montse's apartment! It was clean, comfortable, spacious, and looks exactly like the photos. We specifically enjoyed our time sitting out on the balcony, whether it was getting our day started with a bit of coffee in the morning or sipping a glass of wine before bed. The location of the space is perfect. It is near to two Metro stops which will easily bring you anywhere you desire within the city, and yet the apartment is set on a quiet side street which is ideal for peaceful mornings and evenings. Montse thoughtfully provides basic kitchen amenities as well as a blow dryer and iron. There is also a washer located in the half bathroom, which we found particularly advantageous. Communication with the host leading up to and during our stay in Barcelona was superb. She even took the time to recommend several of her favorite restaurants and activities. Worth noting is that she has provided a large map of the city on the apartment wall complete with the attractions, supermarkets, etc, which we found to be very helpful in navigating our journey.
If we had to recognize a downside it would only be the point that the apartment is on the fourth floor (which truth be told is more like a fifth floor) and there is not a lift in this building. Montse was kind enough to offer her assistance with our luggage upon arrival, but if you have problems with mobility I would not necessarily suggest this situation. However, if this is not the case then you will enjoy a bit of cardio and a calf muscle workout every day free of charge! :)
All in all, this apartment will make you feel like a local, and we could not recommend this more highly. Enjoy!