The apartment is immaculately clean and in an unbeatable location on Rambla de Catalunya, very near to the Passeig de Gracia metro stop. It's among a hot shopping district and only a block or two from Gaudí's La Pedrera and the even-closer Diagonal metro stop. It's also a couple of blocks from a large supermarket, if you plan to use the apartment's kitchen.
Mario was very kind and tolerant of our arriving an hour late to check-in. He also gave good recommendations for what was around and where to go. The cleaning people who came when I was checking out were also SO nice.
A few things I wish I knew about the apartment ahead of time:
1. As far as living needs go, the apartment comes with towels, linens, plates, pots, utensils, laundry detergent, and hair dryer ONLY. There were absolutely no toiletries, toilet paper, or any cooking supplies provided — not so much as salt, oil, or tea. (We did buy some and leave them, so perhaps this has changed!) If you can, bring your own or buy at the nearby corner stores or supermarket.
2. The hot water seemed to be on a timer (maybe only 10 min?), as the shower would suddenly turn cold without warning. Two of us were left with conditioner in our hair or soap on our face. The water is icy after. For three ladies trying to share one bathroom, it was a challenge. Best to use the water only to wet and rinse.
3. The apartment can comfortably sleep 4 if you can share double beds.
I recommend this apartment — is a deal, given the location and building, and during peak season. Thanks, Mario!