One of the biggest gripes Gamespot had about this game was the nature of the microtransactions. I didn't consider it in my review, but it's definitely worth mentioning.
Available for additional purchase after you download the game ($15) are several add-ons. These don't change the game dramatically, so none of them are critical to actually playing through the game. However, some people are completionists, and it will drive them up the wall to know they don't have everything.
The items for download cost between $1-3. Some of them simply add new dungeons for your followers to complete, along with whatever rewards might be found therein. Others allow for new buildings to be constructed, including those which draw citizens of different races to your city. Still others are just cosmetic upgrades, such as a new outfit for the king.
My reaction to this was somewhat double-minded; on the one hand, if you're enjoying a game, what's an additional $1 to add in some more content? On the other, purchasing everything they have available doubles the price of the game. And a full dollar just for a freaking costume change? That's ridiculous.
On top of that, it seems as though a lot of the new content is built into the game; this means that you're just paying to unlock it. A lot of people rightly fear that games will go in this direction. You pay full price for a game that only allows you access to the most basic aspects of it, while slowly bleeding your wallet so that you can enjoy the entire game.
You might find this to be a disgusting business practice. I can't say I disagree. I guess we all have to vote with our wallets, but good luck turning back the clock on this one.