Meh. Amusing, but not amazing. 
 The tropes making up the characters and the story are more or less "Wild Wild West" meets "The Expendables", with the twist that all characters are animals. It doesn't take itself seriously, obviously, and is intended exactly as the joking entertainment it provides, and it's an easy read and it made me smile. It is exactly what it set out to be. 
 On the other hand, it did not set out to be a masterpiece of writing; it did not set out to be a story with any sort of message - despair, hope, love, hate, none of that; it did not set out to show character complexity of development. And it achieved none of that - the writing is (on purpose) simple, full of pathos and random fourth-wall-breaks; the story literally makes a point of setting itself apart from thoughts of "and then what?"; the characters are unidimensional killers with one specific trait each. 
 This is a very well executed piece of brain candy, no less and no more.