Righted their very few wrongs with a better story, more detailed environments, and far more humor.
Travel to the new area, Jakobs Cove, can be done at any point in your adventure and the enemies are scaled relatively close to your current level. While it can be started at any time, the plot will be more cohesive if it is done after completing the main adventure. Several references are made to the original game that may not have happened yet if you have not finished.
The first thing players will notice is the much darker atmosphere. While each area has it's own feel, they all are spooky and creepy. Black, leafless trees are everywhere. Most of the buildings resemble haunted houses and every single aspect of each zone has far more detail than the barren deserts of the main adventure. It is much more fun to simply wander around and explore than it was in the past.
The zombies look equally as creepy and have a decent variety, though it won't be too long before you start seeing repeated enemy types. The different zombie types not only add variety, but strategy as well. Headshots are the most effective way to take one down, but not all of them make it easy. Some run at you with their arms outstretched in front of their face, while others have broken necks that cause their heads to hang back behind them. None of the basic zombie types are too difficult to take down even without headshots, but there are plenty more surprises that will keep you on your toes. There isn't a single enemy type recycled from the main game. Some are variations of past enemies, but different enough that they stand apart.
The headshots have another purpose in the game as well. A critical killshot to the head will cause most any enemy in the DLC to drop a brain. These brains are used as part of a collection quest. Unfortunately, the implementation of it is really the only downside to this new add-on. From the moment you enter Jakobs Cove, zombies will start dropping brains for you to pick up, but you don't get credit for any of them until you get the quest. This quest is also a five part mission that requires you to return to the far corner of one of the rarely visited new zones. If the player keeps up with this mission while doing others, it isn't too bad. However, I didn't even find this particular quest-giver until after I finished the rest of the DLC and am now stuck searching for literally hundreds of brains. One more thing to note: there is no fast travel in the new area. It isn't particularly large, so it normally isn't a problem, but this becomes tedious when frequently having to return to the brains quest NPC.
The story is constantly pushing forward and is far more entertaining that the main game. It never tries to take itself seriously and the most entertaining parts were when the game intentionally walks right into a typical zombie movie cliché but then makes fun of itself for doing so. Even the ending pokes fun at the poor finale of the main quest. All of the dialogue is new as well, even the random comments by the Claptraps that don't really have anything to do with the plot. While I did smile a few times during the main adventure, I never actually laughed out loud until this DLC.
Most gamers will probably take around five hours to complete, but could be more depending on what point they choose to go after the brains quest. For a ten dollar DLC, this is fairly impressive since many full priced retail games have the same length. If I had to ask for something more, I could say that it could have used a few more side quests as there were only a handful.
Well there wasn't much that needed improvement, everything that could have been was addressed with The Zombie Island of Dr. Ned. There is absolutely no reason for anyone who enjoyed Borderlands to pass up this add-on. It does just about everything right, which makes me even more excited for future promised DLC.