I recently bought the Oxford CD set not as a learning tool during training (I used Thom) but as something to refer back to to brush up as a refresher. They are excellent - I agree the voiceovers are a bit twee at times but the graphics often go a long way to explaining in seconds what you would need to read and visualise over several pages of a book.
I wish I had bought them during training as there were a couple of sticky topics I struggled to get my head around but the CD's approach made it perfectly clear first time around.
Recommended ... but not cheap.