Reasonable exercises; mediocre design.

The games are good, but not very challenging at all. The layout is the major problem.
Its very easy to hit the incorrect button, and unlike other similar applications, this one accepts your answer immediately upon button press. The keys are also in a layout that is not common, so it slows response time.

The absolute WORST part, though, is that if there is any interruption to a game (for example, from a text message), its locked out for the rest of the day, unless you delete and recreate your profile.

ummacles about Brain Exercise with Dr. Kawashima