Well, just finished up the season, and I enjoyed it quite a bit. I particularly liked what they did with the final couple of episodes with the relationship between Mike and Fiona. I thought the relationship was a weak part of the show and quite dull, but I think they did enough in those final couple of episodes to make it a bit interesting.
I liked how the season finished, looks like things will get quite interesting. They just signed Garrett Dillahunt (Deadwood, Terminator) for an episode... hopefully he'll appear in more episodes.
Reports say the show is doing really good in the ratings, the final episode got about 7 millions which is a very good number for cable shows.