I never could get myself into Oz, I found the way it was presented a little annoying. I think I got through about a dozen episodes before dropping it.
Finished Justified, the final season was enjoyable and so was the finale, I liked the happy ending. If I were to be critical I'd say it was all a bit of an anti-climax. Other than the last 20 mins it was all, including the last episode, like pretty much every other season.