We stayed her with our 3 children aged 4, 6 and 8 years, and it was great!! they all slept on the top floor.
the appartment is very nicely designed with several doors so you can create separate spaces or 1 big space. well equiped also, incl washing machine which is useful with kids;-)
the only thing to take into account if you have kids are the stairs: they are quite scary and dangerous so not suitale for young(er) children. and there is no elevator, but for us it was ok.
we were even able to park our rented bikes in the basement during the night.
via the paso peotonal you can easily cross the train tracks and visit the Rufaza district which was our favourite.
absolutely great and we want to return soon!