The AI once you reach champions cup (tennis) is probably the best Ai I've ever played on any tennis game. The opponents always play different points almost never predictable. It's a very smart AI
I'm now ranked #1 in both cup challenges and cup matches I have to admit the motion controller feels a lot smoother in Sc2, but its not as accurate as gst2 under pressure or when trying for power shots.. The 1 to 1 gets confused and causes miss hits if you become uncalibrated under pressure. While at times you hold the controller behind you for a power shot and nothing as far as power. I hope they can fix the accuracy of the motion controller and add more cups.