Mònica's space was so perfect for my recent trip with four friends. Five adults, and we fit in this place with room to spare! It was very clean and Mònica was very responsive in the time leading up to our stay as well as during. She made everything so easy.
The apartment is 4 floors up an 8 or 9 story building, and the balcony is cute and has a nice view. There is an elevator in the building, though we didn't use it much.
I can't stress enough how PERFECT the location of this airbnb is. We walked to all the big attractions, Gothic Quarter, Park Guell, La Sagrada Familia. Everything basically within a half hour walk and we weren't bothered at all by neighbors/street noise. We LOVED this place and would highly recommend to anyone looking!!