This apartment was perfect for enjoying sagrada familia's unique architecture-- It would be hard to find a better view of the cathedral, and you can enjoy it with some wine or beer on the balcony. Also, it is very easy to access the rest of the city from the metro stops only blocks away (buy the T-10; 10 rides and you can pass the ticket among multiple people).
The apartment itself is clean, well-decorated, and relatively spacious for the area. The bathroom is definitely European in size, but it worked alright. There is also an elevator, which is nice because the apartment is on the 5th floor, but you may have to take it in shifts (also European in size). Close bodegas with good wine and beer and some snacks--just use the one across the street.
We didn't get to meet Maria, but Artur (her friend) was very nice and helpful with check-in, recommendations, or whatever.
Really, you are here for the views and location. How can you beat those views? If it's available, this apartment is your best choice in the neighborhood.