Dedication to historical accuracy (Something I especially love as a historian) - knowledgable and helpful modding crew - fantastic gameplay - more units than one can even use at times - and it looks absolutely beautiful. Very possibly the best mod I've ever played for any game. Ever.
Great game if you love mmorpgs. You can grind forever, as there's no level caps. I would give it a 10, but my only complaint is that it's not super original, as a lot of the concepts seem directly ripped from runescape. But, this is a much better game than the current version of runescape.