I have to say that I'm writing this solely because one of the very first reviews I ever did on IMDb was for this film's predecessor "Deadlands: The Rising" and it was an awful review. Seriously...it was terrible and I still stand by it. But redemption can be sweet (even if the person getting it doesn't care at all about the person giving it, as is surely the case here). Deadlands 2 is by no means a great movie, but it's certainly watchable and a HUGE step forward for the director. Yes, it's still a low budget zombie movie, but it's better in pretty much every aspect.
The plot is pretty straight forward for a zombie movie. Throw a few strangers into an enclosed space and watch them battle wits with the undead. A bit derivative, but it's leaps and bounds better than the last film. One pitfall avoided that many directors fall into that is avoided here is the desire to use tons of blood/gore. Don't get me wrong, I love gore. It's just that it can make a low budget film look cheap and cheesy. Hell, even the zombies looked 10 times better. In the last movie they were just regular folks with white grease paint on their faces and black around the eyes. Looking like rejects from a Misfits album cover is no way to make zombies.
All in all the movie is flawed and if you don't know it's a low budget flick you might be disappointed. I, however, was pleasantly surprised, knowing full well the horrors of the previous film (sorry guys, I still think it was just terrible).