This place was a great solution for us, as it was me, my husband, my toddler, and my mom, so we had 3 different bedrooms to allow for privacy and nap times. It was great that the place had air-conditioning (although be aware there is only one AC unit, in the living room; but fans are available). It was simple but comfortable and I would recommend it to others.
Alejandro was extremely responsive to email and Whatsapp which was very helpful.
Location worked out well, being relatively close to La Sagrada Familia and the metro, although with four of us, we typically took a taxi as it's much faster and pretty cheap (easy to find taxis in front of the building).
Things to be aware of:
-If you need a pack and play, make sure to request specifically that it be brought onsite for your arrival (it took a couple days to get to us, so we had our toddler sleeping on a mattress on the floor for a bit).
-The 2 outer rooms (the largest bedroom with the two twin beds, and living room) were quite loud due to single-paned windows and being on a busy street, but overall it didn't bother us, just something to be aware of if you are sensitive to street noise.
-You can also hear others in the building pretty easily; but as expected for an apartment building. Again, just something to be aware of if you are sensitive to street noise.
-We had to buy our own shampoo, conditioner and body wash as there was none as we expected - we left it behind though for the next folks. May want to bring your own just in case.
-Cooking supplies were extremely basic - vegetable oil, salt and fake sugar. Supermarkets are easy to find/close though