Addicting!
Man, oh man is this an addicting game. I still have fun just picking it up for half an hour to play through the game. To all the people who are complaining about the difficulty, here's some tips:
SURVIVORS! In the beginning, don't even bother going for weaponry. Having two extra people to fight (And being able to repair 15% of the barricade in 1 hour) is much, MUCH more useful than having the revolver. When you get up to 4 or 5 survivors, then work on getting weapons.
The Notes and the Diary. You've got two sources of tips in-game; read them. It takes all of 10 seconds to look over the note and the diary, and you've got a helpful tip for surviving the night ahead. Granted, they won't always be useful, but they often give you a good idea for how to stay alive.
Automatics and the Chainsaw. The two most useful weapons you can have. The chainsaw has an instant reload that doesn't require you to stop using it, and automatic weaponry will rip through just about every zombie type there is. Plus, the first auto you get has an extremely short reload time, so you shouldn't have much trouble.
Don't waste hours repairing the barricade back to full. Once you get up to automatics, the barricade will take maybe 4 or 5% of damage each night. With enough survivors, you can repair several nights' worth of damage in a single day.
Aim for the legs. Most zombies are pretty tough, and can take a lot of damage to the torso (Fat ones and soldiers can take a full 25-shot clip before they die, even). But once a zombie's legs are gone, it can't get back up. This is especially important when the soldiers show up, and are nearly impervious to torso shots.
All in all, a very challenging, yet entertaining game. For those who think the game is *still* too hard to even play, go and try the second game. It's a lot easier, with weaker zombies and (usually) only the occasional running zombie. Very awesome concept and execution, for both games.