Not too shabby, but rather shallow in long-term appeal. I know it's silly to complain about it, but at the end of the day it is just a game of rock/paper/scissors and it doesn't really bring or add anything interesting to the formula. For example, it'd be kind of cool if we could customize our own character avatar like I thought we could (especially since it's online), but the rewards are only characters and you need to play for an inordinate amount of time to get anything, so there's no hook there. The game could've been enhanced with some interactivity, but I was really disappointed that we don't even have to click the trigger to make the shot ourselves as it just goes off automatically in a canned animation: I think having that extra click to actually pull would add so much more intensity and immersion to it. The menus and such are also very bland with stock text and minimal animations that could've added some pizazz, and finally, the death animations aren't gory at all: was really expecting some serious brain matter spilling out of cracked skulls: it's Madness after all!
However, that's not to say it's all bad. I do think the game is rather stylish and charming with a lot of nice touches to it. I like that the music gets more and more intense as the odds get more and more risky with empty chambers being depleted, and I like seeing the characters sweat (though I wish they would also increase in shakiness and sweatiness more as the game goes on as well). I also like that there are unique animations for each of the characters in how they take their turn. And of course, it is rather impressive that it has a whole online feature and lots of prizes to get, even if they do require way too much commitment to get since it's all based on luck after all.