Great questions that go well with the podcasts and other available information. A little easy in some areas but a good refresher. A few small changes would make it excellent - a summary of the score just received for the block of 20 questions done rather than just the running summary would be nice. An ability to go back to the questions incorrectly answered would also be helpful for revision. Finally some questions and answers aren't fully displayed depending on the way the device is tilted - some miss off the last half of the question but it then displays when you turn to landscape or vice versa.