Fallout 3 DLC came out "early", via Marketplace on the web. Already downloaded and finished it (first in the world according to MGC).
Took about 2 hours, but I rushed through it. It's pretty easy, as there are many places for you to completely restore your health and ammo as much as you need. Was still fun, and I'll probably run through it again, to get all of the intel(hidden items, of which there are 10. I'm assuming getting them all will get you the new perk, which I did not receive).
XI Wiki


