Without a doubt, one of the finest comic books of recent years. Intelligently written, believable, realistic and thought provoking, if you're a fan of more serious, grown up comic books then this is for you, even if you do not like horror or zombies it is worth giving a try.
Kirkman is a genius and nicely accompanied by talented artists (though I do prefer Adlrad's work from issue #7 onwards) and this book is only the tip of the iceberg. Containing the Days Gone By and Miles Behind Us arcs, compiling volumes 1 and 2 it sets the stage for later events and worse things are always just around the corner.