comical44 - You're talking the movie with James Franco. My roommate says, while the visuals are interesting, the story is dull, the characters flat, and the tone is somewhat sexist. She doesn't recommend it.
lagwm - You're talking about the HBO series and I'd recommend stay with it past the first season. For what it's worth, OZ is one of the few series that truly has "Any One Can Die at Any Time" trope (Spooks aka MI-5 also comes to mind). The overlapping story-lines and character arcs are engaging and I enjoy the plot/narration structure of the series. The tension never lets up- established characters are killed off with little fanfare. Fitting for a show set in a men's prison.