This expansion feels a little something like Warhammer 40k: Soulstorm.
The one-sided NOD single player campaign is quite lengthy and serves to introduce the new units and structures in a well thought-out fashion, but the plot suffers from a so-so script and distasteful acting, which makes it a drag to go through the 13 missions.
The tutorial for the Global Conquest seems a little broken, but I think it's just me. Anyway, if you've played Warhammer 40k Dark Crusade or Soulstorm before, then this Global Conquest feature pales in comparison. In this case, Kane's Wrath provides a fine strategy gameplay for a good 8-10 hours, but lacks oomph for the hardcore C&C fan.
KingLim