Well worth the pennies! (For info I have a Diesel Clio)
I bought this book shortly after purchasing my first car as I wanted to maintain the car myself as much as poss! It has clear pictures and instructions and it definately gives you the confidence that you could fix the problem yourself.
If it wasn't for this book I wouldn't be able to do much more than inflate my tyres and fill the windscreen washer fluid!
The only thing I would change is that is doesn't tell you what tool to get out the sump plug for an oil change (its square btw) but other than that it has been spot on.
Bought the megane version for my other half as he rode his car 4x the recommended distance without an oil change and blew the turbo - idiot! And they say men are better with cars!
The only people who are likely to rate this book low are the mechanics that will lose money from you fixing you car yourself!