Starting off with the only con: the short campaign that was extremely short, quite vague, and didn't entirely explain what was happening to the main character. But the game doesn't end AT ALL with just the campaign. The game is stock full of mini games in which you gain score and rank, and for me the highlight of the game was it's exciting and sometimes chaotic skirmishes in which you can choose either side of your choosing.
This game is exceptionaly deep with so few unit variety. All races have their own major advantages and disadvantages giving each side a play style of their own. The gameplay is simply briliant giving you many tactics and techniques through skillful micromanagment with a variety of only 5-7 different, yet completely unique, units.
The interface may take some getting used to for most people, but once you do you will realize how well built it is for the iPhone/iPod touch. And the game holds it's last state so that you can turn it on, play a bit, close it to do something important (act like you're still working), than get right back into the game making it something you can play anywhere, easily.
I enjoy the highlighted style graphics as much as I did in the earlier installments of this one in a kind franchise, and I hope to see another spinoff of red vs blue in the future from you Cat in a Box Games.