The Cursed Gun in Borderlands 2

The Bane is almost completely useless, as well as being incredibly annoying.

If you can handle the annoying sound effects, it can be useful when playing as Anarchy-spec Gaige, or when you want to unload a lot of damage into a large enemy at point blank range. Besides that there's no reason to keep it.

It can be very useful during fight-for-your-life time because you can't move very quickly anyway. The accuracy starts off pretty good, and generally improves the more shots you fire (since it's a Hyperion SMG). Wiki