I bought this book on the off chance that my 20 month old daughter would listen to it in the car, instead of the same old nursery rhymes.
Wow - after about hearing twice, she was hooked - she ALWAYS asks for "Charlie Lola" in the car and we have to hear this every time. But the best part is we (the parents) love it too - I must have heard this over 50 times and my wife over 200 but we're still not bored of it and neither is my daughter.
She joins in at times shouting out a word or sentence "Ready-steady-go" before the characters do and you know she's listening even when we've switched off, because every now and then she will chirp up with a word.
The other v. positive benefits are that these CDs give our child an opportunity to visualise things in her mind and so stimulate her creativity without even seeming like it's education.
Thoroughly recommended on all levels.