Highly recommend a stay at Luis' apartment! The room was exactly as described, if not better, the convenience of the private bathroom in the room was really great. The room has A/C, the bed is comfortable, and the bathroom was very clean! The shared kitchen we didn't use much but had our space in the fridge to put away snacks and water. There are a couple other rooms in the apartment also for airbnb visitors and we almost never saw them, very quiet overall.
The location is unparalleled, maybe a 7 minute walk to Casa Batllo, and the neighborhood is really nice with lots of stores to shop and great restaurants!
We were check-ed in by Juan, very easy check-in and communication and available for any questions you have of the city.
Highly recommend a stay here!
Also take Juan's recommendation for dinner at the tapas restaurant nearby called Vinitus, best meal we had on our entire trip!