I have finished the two introductory campaigns, and started the economic campaign, but I have decided to shelf the game for now. It's not very fun. They have stripped down a lot of things that made "Stronghold" games unique in favor of making it speedy. When the biggest "military" strategy is spamming units and when it comes to kingdom building the variety is very low, it's hard to see what in this game will make me keep coming back to it.
It isn't without some strengths though. It looks pretty good (with enough of a throwback not to look sloppy), and it does have novelty of being a "Stronghold" game that isn't European-centric. Also, if you enjoy spamming and having fun with the battles, it's pretty good for that too. But when it comes to core gameplay, I found it very lacking. I will stick with the older ones for now.