Well I finished Battle Sister and I'm kinda glad I pirated it, if I'd spent ~£15 on it I think I would have been very disappointed. It's fun running around with Bolters and Chainswords killing shit, but the level design is a bit crap and the final boss is annoying as it relies on you using a crappy mechanic that doesn't work half of the time to defeat it and if you fail you have to sit through an unskippable cutscene each time you retry it.
What's the hoard mode like, I seem to remember some anons playing it ages ago.