How bad is it? It's a post-apocalypse film that makes you long for the apocalypse.
Should you see it? No.
The last survivor from an internment camp for children works as a bounty hunter in a wasteland surrounded by a large white wall. There's some decent martial arts in this, but the acting is bad and it's extremely dull. The idea that in the world after the apocalypse people are still holding down jobs and keeping things in as good of order as possible is interesting enough to make a good film; this just isn't it.