I already had a Galaxy Core 8 gigas, I have always, and I am 100% satisfied. But when my daughter moved abroad, I bought her this model so that it can have 2 sim cards (for that of Free France, and the new service abroad). She is satisfied.
By cons, has avoided the Galaxy Core 4 gigas (my wife) - because the internal memory fills too quickly with the photos - and I have not found a way to switch the pictures on the micro-SD card.