The place is perfect for a small family. My kids (5,3) loved the bunk bed. It is well located, close to the mall but also walking distance from the rambla and the beach.
We spent the whole stay in Poblenou but as the apartment is close to the metro station, it is easy to go to central Barcelona. (Taxi will cost you around 12-15 EUR)
The small details were also good: Cookies, kitchen supplies and toys and books for the boys.
I would definitely stay again. Thanks Pau. you have a beautiful property.