A very cool and interesting DLC with an atmospheric setting, nice companions and well-done story. I was pretty annoyed that it confiscated all my items but it's understandable for balance reasons. I like how it offered a slew of challenges not present in the main game with the explosive collar, (mostly) unkillable enemies and toxic gas. I'd say the only real downside is that I already had more than enough money and equipment already so by the time I got to the vault I didn't really want the stuff in it so the moral of the story was lost on me. Good ending aside from that though.