I got this a couple of days ago and so far I'm very impressed! This is brilliant to play even if you only have ten minutes to spare. There is a good practice section where you can attempt questions and then it will not only tell you whether you're correct or incorrect, it will also give you a little more information about the answer.
Definitely recommended especially for those whose who don't always have an awful lot of time to sit down and read through the books or watch the CD-rom/DVD. (In my opinion, it wouldn't surprise me if in the future they brought out a version for the WII too.)