I haven't read any of the other reviews yet, so I may end up repeating...
Overall, the game is just so-so to me. Worth the $20 I suppose but I did expect more.
Pros: Ability to save up to four personal data files so the whole family can track their progress. It also remembers things like birthdays and responds to things such as time of day or time of year ("Good morning, the days sure are getting hotter aren't they?"). The challenges themselves are fairly entertaining. And while occasionally it won't recognize things I write, 99% of the time it does. When it doesn't, it is because I was rushing or being sloppy.
Cons: Not enough to do! New activities are "unlocked" very infrequently, and from what I can tell, there aren't that many to unlock anyway. So you are basically stuck with the same 5 or so activities every day. And it will only actually record your results for each activity once per day. You can practice as many times as you want, but it doesn't count for anything except practice. Also, my 8 year old daughter has a somewhat hard time with some of the math and other challenges. Another con is that the tips and tricks and other phrases that are shown to you are repeated very often. I wish there were more variety all around.