Perhaps the greatest praise GameSpy can heap upon Point Lookout is that it doesn't feel tacked-on but more like a natural extension of everything that makes the new Fallout what it is. You have plenty of unexplored territory to wade through, and the new swamp environment and the accompanying weather effects make doing so feel fresh and exciting. The quest lines and exploration gameplay feel very Fallout, and you'll want to walk through every inch of the map to make sure you don't miss out on the many different landmarks tucked away in its farthest reaches. The battles can be quite challenging, and there's plenty of creative, genuinely funny stuff here that'll have as much of an impact as the greatest bits from the original game.
If you're a Fallout 3 fan then this one's a no-brainer. Highly recommended.