I was very disappointed with the first season. It started off pretty good, but then halfway through the first season one of the more interesting characters dies, and then it still has half a season to fill. Also, it kind of undermines the suspense that the main character is pretty much invulnerable. Even when the hero does get hit by the one thing he is supposed to be vulnerable to, we see him limp quite a distance, thus confirming to the audience that their lead is pretty much invincible.
I have not watched the second season yet, but I don't think I will.