In a nutshell:The most popular historical real-time strategy around gets another update, as you're put in control of the natives rather than the colon...
ProClosely integrated with the original game
ConsNot much new content added
Progood content for money
Consneed improvements in areas
ProMore Units, Buildings, Campaigns, multiplayer Maps...
ConsPrice (Having to buy Age of Empires 3 and then the...
ProNew exciting features and levels
ConsYou need AOE 3 as well