This is an excellent training aid that is very easy to use and understand. I put the time aside to use the cd a couple of hours a day, and ended up passing the test with a score of 49/50. The only reason I got one question wrong was due to my own cockiness.
Would highly recommend this product to all that are planning to take their Motorcycle Theory Test, but also remember to buy (and read) an up to date copy of the Highway Code. The more knowledge you equip yourself with, the more of an edge you will give yourself; not only in the test, but also in every day riding/driving.
Good luck to all with the test :)