The Improvement Mod touches on every aspect of the game, improving and tweaking every feature the game has to offer while also adding many new ones. The mod adds new units, buildings, maps, civilizations, soundtracks and game modes. All of this results in a very refined gameplay experience powered by an improved AI and more detailed graphics. Check the "Features" for more details. The mod works with both versions of the game, Steam and non-Steam, and is only available for The Asian Dynasties expansion but requires Age of Empires 3 plus The WarChiefs expansion and The Asian Dynasties 1.3. It is recommended to install over the AoE3 Complete Edition (Steam version) as it contains everything the mod needs.
The mod works flawlessly, it adds many buildings and changes a lot of things that were already there, including the AI, balances, ect. It adds the United States to play with as a civilization too.
Just by reading the change log of each version, you can see the absolute dedication Mandosrex has for this mod.
I thank him completely, as to any other modder who provides such a quality modification to a game, improving it, for everybody, and for free.
If you follow his instructions, the mod works without any problem at all. It never crashed, it didn't slow down the game either. Everything works as intended, and that's just something you don't see everyday with mods.