It's okay. I think it's overhyped a little bit, maybe by the older movie watchers and young movie watchers that want to be seen as cool for being able to appreciate old cinemas. But on its own the movie isn't really anything special.
Maybe this movie got overhyped because it's of the first few prison breaking movies, but the that genre has been done so much better ever since this movie came out, Shawshank Redemption being a prime example. Respect it for being a pioneer, but rated objectively by today's standard, it's nothing special.