Season 1 was exceptional...well acted, brilliantly written and edge of your seat exciting. Simply great!
Season 2 was completely different from the previous, but quite good. It had a good cast and a good plot, but in my opinion unfairly critiques and compared to season 1.
Season 3 was slow...although the acting was superb, it just seemed to drag on and on turning it into a painful and boring experience. I believe that the series could have been condensed into 3 or 4 episodes rather than subjecting the viewer to indulge into a whole lot of nonsense.