Had some experience with Zombies 4 now and found it too deadly and also boring as is. Too many "plain woods" map tiles for my taste... most of the 30 tile deck! I cut the map deck down to 16 cards (as big as the mall, keeping all but the extra cave named locations and 3-4 plain woods tiles). This made the woods more exciting... lots more tokens to pick up in smaller area, but still too deadly with all those zombie dogs (5-6 to kill, move twice as fast as regular zombies). Thinking of making huma zombies only on the plain woods tiles to "mix things up" a bit. Just fighting zombie dogs is boring (and too deadly). I'm using the cut down woods map deck with my city/mall game; no desire to play plain woods as written. Not a waste of money, as dogs mixed in with regular zombies is fun, plus cool event cards and red heart tokens. Just not as good as other Zombies expansions.
Zombies 2 (military base) shipping to me this week... can't wait!!! Me and all my friends are so addicted to this game, that my friend even bought his own copy so he could play it with his 7 year old son!