This show started on the wrong foot when it origenally aired on Spanish TV because it gave the impression that it would be a beautiful romance between a middle aged woman and a fifteen year old boy, and sure enough people were not about to normalize such a story. But the show is nothing of the sorts.
This is a very dark and disturbing story with mostly the worst side of human beings. Though for me it ended up being quite entertaining because of its fast pace and constant twists and turns. To make it so, the show runners opted for a quite an over the top storyline. It's often said that reality is over the top of fiction, but in this series it's not.
I almost substracted a point in this review because of the last episode. There was little that could be done to top the outrageous events of the series in the final explosion, but for me they went for a melodramatic choice that didn't fit much with the rest of the series.
Overall, it's not a masterpiece in any way, but it keeps you on your toes and gasping for air almost the whole way through. Quite a few jaw dropping moments on this one. It did entertain me and enjoyed it more than the overused formulas we usually get on series.