I just didn't know what was going on at times. The story was shooting off at all sorts of angles that didn't seem to have a logical progression. One minute Sandra is madly in love with Castro for whom she's waited for years, the next she's having a torrid lesbian affair. There just wasn't any rhyme or reason to it.
Layers of complexity are added as new truths are revealed but it's not actually police work. Sandra's fortuitous photographic memory leads to linkages that others without the facility would miss and did miss.
I particularly disliked the last episode with its dream sequences and flights of imagination. And there was so much left unresolved too.
I watched it all the way through but I can't consider it a success.