Black rock shooter the game has many problems, the first one would be the gameplay. This game focuses too much on gameplay that it feels like it has abandoned the unappealing storyline, if they wanted to do that they should've made the gameplay better not just pressing O and square to win. The second problem would be the graphics, for a 2013 game it feels very outdated. The last one is the ending, it ended with a boring last boss that could be beaten without "Repairers"( More or less like potions ) and they didn't explain much about the story in the end, it ended with many questions unanswered.
So I wouldn't say you shouldn't buy this game as this is only my two cents of the game, if you're a big fan of the anime Black Rock Shooter I'm sure you might like it.