I absolutely loved it, and it takes a lot to pull me in; I'm 58 y/o and never in my life have I been drawn to a TV series like this.
It was extremely well written and directed, it included suspence, action, romance, and humor.
Ever though I had heard from several sources that ending was disappointing, I thought I perfect. The story had a slow climb in the beginning, which picked up rapidly towards the end. Then it had a very exciting climax with a surprise ending, followed by a quick regrouping where the it revealed the main characters pursuing their new lives...perfect literature!