We had a very pleasant stay in this apartment.
The flat was easily accessible by the lift and it was great, because we had 2 kids and a stroller) It was bit tiny for us , especially the second room with two beds (one upper, one lower). But I only can imagine how gorgeous the stay might be in the summer time, when you can access a large terrace and relax. At the beginning we had some issues with the heating system, but the next day everything was fixed. I'd like to say that Carlos is really managing his flat even if he's far away. Unfortunately we hadn't met Carlos in real, but his brother in law and mother were very helpful.
I was so glad that we had chosen this location in a calm residential area full of stores, cafes, bakeries etc (please check the tips Carlos wrote, they're really helpful). At the end of our stay we also discovered a small market on the -1 floor of the shopping centre close to the Camp Del Arpa metro station.
Hospital Saint Pau and Sagrada Familia that were in the walking distance are the really must see sights. A few metro stops or 15- 20mins by bus and you're in the epicentre of the tourist attractions.
Carlos, thank you for the hospitality!