Had a brilliant stay, the neighbourhood has several cosy little bars, supermarkets and other shops. I would recomend the bar opposite, Bar Xtol, Carlos and Beylin will look after you with tasty snacks, excellent coffee and reasonably priced drinks.
The appartmement is clean, and modern with the rooms with bunks beds, a master bed with ensuite and the sofa in the lounge could be used as a bed if needed.
Parc Guiell is easily walking distance and most of Barcelona is accessible within 30-45 minutes. Local transport links are very frequent and easy to use.
We were there to celebrate a birthday and managed to lock ourselves out of the appartment. The hosts sent out a spare key in a taxi, excellent service and very understanding.
I know everybody mentions it, but the neighbourhood is very hilly, if you are prepared for a bit of a hike, you will be fine.