The Good: A new city!, amazing setting, great story, super fun Auto Axe, reasons to come back
The Bad: Can be a bit tough, only four hours?, not enough new actual content
Well, here are with part 2 of the Fallout 3 DLC and boy is it a huge improvement over the last one. I'm not going to explain much about Operation Anchorage, but it was linear, stripped away most features, and was kind of boring (check out reviews elsewhere). The Pitt actually adds a whole new city which is post-apocalyptic Pennsylvania. You are to free slaves there and find a cure to the rad poisoning that's getting to everyone and turning them into "Trogs". Yes Trogs are a new creature you'll discover and are even creepier then those Ghouls.
The Pitt is fairly large and you start out on a bridge that was a once freeway that led into Pennsylvania so you're right on the border. Once you cross the bridge you lose all equipment (don't worry you'll get it back!) and talk to these poor people and fight in a gladiator arena to win an audience with a man named Ashur. I won't go any further since this will spoil stuff, but The Pitt has an awesome new weapon, and mainly a great story and new setting.
The Pitt is very industrial with a huge steel mill, a steelyard that goes hundreds of feet above the ground. To get an idea of how big The Pitt is you need to take the Citadel, Rivet City, and the whole area around the Capital Building (you know with the Washington Monument and that huge lake) and you have The Pitt. While most of it is indoors and in the steelyard you'll spend a good four hours exploring this amazing place.
Thankfully there are reasons to go back here (which I won't reveal due to spoilers) so this setting isn't a once shot deal like Operation Anchorage. The Pitt is just very gritty and more dark and mature than the Capital Wasteland and much more dangerous. The whole place feels more scary than the Wasteland (which just felt really lonely) and this place feels haunted. There are Raiders everywhere and there's no way you can fight them all off like you can at the Falls. The new weapon added is the Auto Axe and boy is it sweet!!! This thing spins a deadly blade and will do almost a one hit kill in V.A.T.S. I highly recommend buying this, but also buy Broken Steel as well for the level 30 cap!