I just finished watching the first 3 seasons on Netflix last night. AMC is playing the whole series in order at 3am and 4am Pacific time right now, until the July 15 start of Season 5.
I watched the first episode and was hooked. I started watching five or six episodes per day 'til I finished the third season. Great show really. My only complaint is that they killed off Jane. I hate it when a fine ass women goes to waste. Ha!
Really though, I can't wait to watch season 4 and prepare for the fifth and apparently final season.