Yeah, I paid $50 for it a couple months after release and thought it was worth it even with the bugs. Enemies freezing mid-air and causing you to leave the area and come back if you needed to clear out an area was the most notable bug I found. If you had a huge horde chase you it would get pretty laggy too but I'm not sure if they patched that.
Just a reminder, after you finish the story keep playing and you'll eventually get the true ending after doing some extra missions.
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