I don't think its very fair to rate a Dvd 1 star simply because season 2 wasn't as good as the first. Superjail's second season may have not been as good as the 1st but nonetheless you can't buy this Dvd not knowing what you're getting into.
The series stays true with its humorous gore and chaotic scenes and even explains more into some of the characters history. There are plenty of episodes and even extra goodies to keep you entertained. Personally I find episode commentary and the animatics to be worth totally worth it just to see what goes on in the head's of the creators and behind the scenes, but hey, thats just me. If you're a fan of Superjail I would suggest you pick this up. If you are not familiar with the second season and are hesitant to buy this, then please watch an episode or two online first, just to see if it fits your taste.