The Pitt is gorgeous, and it's worth playing at least twice to try each outcome; I really enjoyed the Raiders. I think the ingot hunt is boring, although looking for them forces a trip through some beautiful views. It could have been much longer and much better, which is a shame, but it's got The Ammo Press, which more than made up for that when I was playing on the 360. I haven't been out there since I started playing on the PC.
Right, you know what? I'm going to buy it. Right now! I'm a new player for not already doing so.
Everything about it sounds great; new items; atmosphere; great story (I've heard there's a tough decision to make); and, of course, the Ammo Press!
Really, I think I left it out was because I only wanted 3. Broken Steel and Point Lookout were a shoe-in, but I was tempted by Operation: Anchorage's new items. I don't regret my purchase, but I kinda feel ashamed that I put weapons over story. Though, in my defence, I heard Pitt was really buggy, and I didn't have the patience to deal with that crap.