Wow, what a fun game!
The gunplay in this game is spot on. Quick draw mode is a blast once you get the hang of it and you'll be mowing down enemies faster than you think you should even be able to once you unlock the dual Colt pistols. You can blast chunks out of peoples heads and blow off limbs with various weapons, and the bodies fly, fall, and roll about in a greatly (morbidly) entertaining way.
It's not hard to be an effective fighter with all that is at your disposal, which is what makes this game so entertaining.
I could definitely have gone for a longer storyline, but I really have no complaints. Don't compare this game to anything else and enjoy it for what it is, you'll have a great time with it, and in the end that's what gaming is all about.