I've only had this game a couple of days but am enjoying it thus far. It follows a similar format to Brain Training in that doing quite well in one test rewards you with the choice of a "hard" option in that particular test (some reward!)and opens up additional tests in the main menu. The tests are quite challenging but I guess they will become a bit easier with practice. The sports exercises are fun, especially the table tennis which is the first additional exercise I have managed to 'win'.
Like Brain Training your progress, or otherwise, is tracked on a series of graphs. If you like Brain Training, then I guess you'll probably like this.