I bought the Oxford Air Law CD-ROM. Big mistake! It's dull, dull, dull! Many of the pictures are repeated and the stuffy narrator drones on and on in a monotone. Highly recommended if you are suffering from insomnia but otherwise avoid
Sadly this is true of most of audio visual training aids on sale. I recently forked out 60 quid for a DVD on the PPL skills test. It's a fair briefing but it must have been made on a shoe-string budget - definitely not worth that kind of money.
I like Jeremy Pratt's books. At least he has a sense of humour!
