Well, to be fair you can't get any better than hands on - however I understand why companies don't want to give demos out - they can be as damaging as they can be beneficial.
True, reading about a game is not the same as actually playing it, but I still think in this case you can get by without the demo for the reasons stated by myself and others...either way, having a demo is always nice. And yeah, I totally understand why companies don't do demos...although you may get a couple more sales out of it, you might lose a bunch as well...
All that being said, as far as this game is concerned, in my opinion, it is absolutely worth $30...if you buy this thinking you're getting War in the East, or on the other side, Risk, then you deserve to lose your money. Read about it, see how it plays, then make the decision.