Sword and Soldiers is a great example of what a casual strategy game can do. It's deep enough for core gamers to enjoy, yet is simple enough that casual gamers can get in to it, while appreciating its deeper elements.
In many respects, Sword and Soldiers is an excellent game. You can criticise its blatant lack of originality and repetitive nature, but that doesn't stop it being a great deal of fun, while its wacky world will seduce many.
Ultimately it's about dispatching units as fast as you can and a mass of units pretty much always results in a win. I have to say that the AI is good and makes the battles fairly even and makes a win possible.