This mod aims at improving every aspect of the incredible game that is Age of Empires 3 and its expansions. From new civilizations to new units, buildings, technologies, maps, game modes and even soundtracks, the Improvement Mod has been in works since 2009 and it's the perfect choice for players who just want to get the most out of their game without changing it completely.
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.