Started to like it, but then the dialog boxes popping up was irritating, forcing me to hit the wrong button. The difficulty ramps up really quickly, and I wish there was an auto-train feature. Great concept, though. Allow me to prompt the boxes and it's 5/5. Right now, 4/5.
Wow...let's QQ some more about getting owned by the computer. Yes, there is a sense of skill via pressing your luck, and it's kind of comparable to the tower card game from the Fable 2 Pub Games.