Extremely fun. A refreshing twist on a classic strategy game.
The constant splash notifications got a little irritating after a while, but it didn't detract from the experience any.
I actually went straight into Hard mode and beat it first time (I've been playing these kinds of games for a while). I got every medal -bar "Beat game without losing a battle"- only to realise that I hadn't logged in! Now I must play it again for medals... XD