This is without a doubt the most unique comic I've ever read. Honestly, it's sort of everything Palmiotti's Harley Quinn run tried to be, except done right... And probably unlike anything you've ever read before.
I've read a good amount of reviews for The Mask, and plenty describe it as laugh-out-loud. Normally, I'd ignore this. It's very rare for me to laugh out loud at a book. This time, though, they were ABSOLUTLEY right. The Mask is largely comedy, and for the most part, it does it VERY well. A lot of cheesy, ridiculous humor that's right up my alley. I mean, how could I NOT laugh at "Hey, wait, they said fire at will, not at me!"?
One thing people love to point out in the differences between the comic and the movie is that there's gore aplenty in the comic. I don't particularly care about gore, to be honest. It can make for some impressive panels but usually it's nothing I enjoy (Despite my love for Saw. The creativity of the traps makes for actually impressive gore.). The interesting thing is that the gore here isn't gross or scary. I honestly think the best way to describe it is FUN.
A big part of what makes this comic so great is the art. In any other plain comic, I'd have mixed opinions on the art. In the beginning, the art mainly consists of plain, honestly somewhat ugly people. After Big-head enters, though, things get GOOD. There are no limits. It's filled with madness that reaches off the panels, creative colors, full page spreads, and so many more impressive feats. As the story progresses it just gets better and better. The noir-ish art even gets better as the story progresses with some panels of Walter being reminiscent of Sin City, which will always be my favorite Miller art.
Which brings me to the thing I was surprised more people don't talk about. There's actually some REALLY entertaining noir elements here that weren't present in the movie! The whole story very closely involves the police force and the mafia. You can't really call it noir, but I'd definitely consider them elements of noir and I'm a sucker for them.
I think the first half is better than the second half. Although the art is much better in the second half, I prefer the writing and jokes of the first. It's slight, though, and both are great.
Overall I'm so happy this was on my list. It's everything people say about it, trust me. Highly recommended as a fun, unique, comedic experience that I'm sure most fans of comic books would love.