Got 10 $? Spend it on Challenge....
The game is all about taking decisions - no boring micro or stupid resource-gathering. Operating your huge army on the battlefield that's what you're in charge of.
New modes add to the replay value of the game. Every combat played in, say, a "free-for-all" mode is some kind of crazy experience where to win one should think several steps ahead. On the other hand, Instant Battle offers a more "rush" type of gameplay where the reaction speed decides everything.
A "must try" for those in love with TW series and WiC. CoH fans might also find the game interesting tho significantly different.
Hope they'll continue working on the series.