I watched it all a couple of years ago, some seasons drag a bit but overall it's really good. But if you've only seen two episodes, it's going to get a lot better. I didn't like the beginning that much myself, I couldn't really get into it until around ep4 or so.

I don't really have anything else to add. It's like with The Wire (which I still need to see), only thing anybody ever has to say about it is "it's really good!!!!!".

The only guy I remember clearly is the guy in the weal chair (narrator guy) who near the end (or at the end?) dies. And one guy who snapped another guy's neck while giving him head and one dude who tried to escape but hit the water system which is ironically the most light hearted episode I have seen, the one legit dude (as far as legit goes) in the whole damn prison, and two female cops who get it on with two of the prisoners with both of said prisoners getting killed shortly afterwards. Oh, and bald guy in the intro theme.

One of those shows I watched at night when I can't sleep at all.