Apartments located in somekind of island of small houses between traditional Barcelona blocks and very new district. That means that you will get benefits from both worlds. There are a lot of child playgrounds, trees and green areas in new district but it is still close to city center and have some shops around. The sea is very close too which is fine. I like the location. Apartments itself are new, you will have everything you need in standard jorney. Apartments located on 2nd floor and there is no elevator, so you need to take that into account if you plan to came with baby carriage (just take smaller one). Transportation is just fine, there are couple bus stops, tram and metro station.
Pau provides very detailed guestbook where you will find propaply all information required for your stay.