Many of the best boss zombies including Avogadro and Napalm zombies make an appearance. These include BLOPS 2 weapons and perk machines which obviously postdate the original WaW maps. It combines a lot of the hard work from the modding community into one downloadable map for WaW. Usually you get a handful of ideas, some of which are based off Treyarch, but never do they get rolled into one complete map.
It's rare that a custom zombies map comes with so many features rolled into one.
