This loft style apartment is exactly as pictured. It's awesome for a group of four because you have plenty of space, comfort, and your own bed. The decor is nice and relaxing. There are heaters for when it gets cooler, which was perfect. I wish there was additional blankets too.
There is also an elevator that is big enough to fit two people and their luggage (that's saying something for Europe).
Plus, the apartment is conveniently located near the Metro (L1 and L2). You can take the Metro directly from the airport to this apartment for under 5 euros. It's an easy ride (although takes 50 mins) and the Metro is clean and nice.
It's also within 15-20 min walking distance of popular attractions like La Sagrada Familia, Arc de Triomf, Las Ramblas. There are also some nice restaurants within walking distance too like Thai Barcelona (which was great!).
The only reason I took off one star is that there was a leak coming from the freezer that caused a weird odor in the kitchen. It was tolerable but it was not pleasant. The host was aware but their repairman wasn't available until the week after we left. That was the main downside of the apartment.
Outside of that, I would stay again.