Well, this is a bit of a disappointment.
Deadlands seems like a pretty cool setting, don't get me wrong. But for every cool idea in there, there's something generic thrown in. The Bestiary in particular is full of enemies based on a very similar gimmick, or just regular fantasy/horror tropes which are present in pretty much EVERY Savage Worlds book I own (werewolves and zombies, anyone?). The backstory of the world is also pretty meh, in my opinion. Like, given the amount of mystery surrounding many of the concepts behind the world, what they all tie in to is not very interesting in comparison.
As always, Savage Worlds doesn't really help all that much with creating a unique feel for the mechanic. The few additions and modification that are present feel like a nod, instead of a good fit. I'm not sure how much different this ruleset is from the original Deadlands system. Also, I'm very picky about my RPG mechanics, so take this criticism with a pinch of salt.
In the end, I'm still quite eager to give Deadlands a go, but I'm slightly less eager to do it than when I first heard about the setting. It didn't live up to the idea of it I had in my head I guess.