The manual assumes a fair degree of mechanical competence. Most of it is occupied with how to undo this, undo that, then it tells you to do the steps in reverse to put it back together. In other words, there is very little troubleshooting addressed in this book. That is okay . . . if you are not mechanically savvy, messing about with today's (any) cars could be an invitation to disaster. I purchased it because I have a minor electrical glitch in my 2005 Saab 95 and I wanted a wiring diagram so I could chase it down myself. Electrical problems can be really difficult to localize, and with today's hourly rates at a garage, I already saved a fortune before the book even arrived. For that I give it 5 stars, for it's lack of in depth troubleshooting I would give it 2 1/2 to 3, so we arrive at a compromise of 4 stars. It was not expensive and it is a good reference for anyone who might own a Saab and is not afraid to tackle minor problems themselves. One thing that irks me though about Haynes, is why is this not readily available in North America? If you purchase it you need to get over the fact that all the pictures are in essence mirror-reversed . . . the manual is from Great Britain, where they still drive on the other side of the road, so all the pics of the interior dash board etc, are based on a right hand drive. Good book, good price. Buy it, save yourself some money at the garage.