The apartment was clean and is in a great location within walking distance to metro stops, restaurants, shopping, and La Sagrada Familia. Check-in was easy. My friend, who arrived earlier than the check-in time, was allowed to enter the apartment early. The breakfast at the cafe downstairs was a nice convenience. The roof terrace is lovely as is the small, private outdoor sitting area that's just off the kitchen.
I wouldn't call the apartment "effortlessly luxurious" as it's described. It's nice and comfortable but there is some wear and tear like rips on the couch, the stove is missing a knob, and as one other reviewer said the described walk-in rain shower is actually quite small. We also did not receive a bottle of wine or spring water as stated in the description.
The only major complaint is that the walls of the apartment are a bit thin and it's easy to hear noise from the stairwell and floor above. This was tolerable most nights but became problematic when there was a bachelorette party upstairs and on the roof terrace.
Overall, I'd still say this is a good place to stay. Definitely a good value if you have a bigger group.