The apartment is as pictured and Enric and Packo really do put in the extra effort to make you feel comfortable. Clean, comfortable, well stocked, good location, safe. We would not recommend this for tall people though. Due to the 5-story climb, we would recommend you pack your luggage in a backpacking pack, as carrying a standard suitcase up the tall and narrow stairs would be a bit of a pain.
Pros: Right next to a very convenient Metro stop. The view of the Sagrada Familia is quite unique. All other positives listed by previous reviewers are accurate and I agree with them.
Cons: The ceiling in the bedroom is indeed quite low. I am 5'9 (175cm) and had to hunch over at the waist (or rather, basically crawl) in the loft. If I were to sit on my knees in bed, my head would hit the roof, even at it's highest peak. I don't think we quite anticipated how low it would be (we are in our 20s and very physically fit, we just like more head room). For us, the special views were not worth the low ceilings.
Also, it's a 5-story climb, which was perfectly fine for us, but we would not recommend this place if you have trouble with many stairs.
However, if the height is not an issue for you, then we would recommend staying here with ease.