Bought for my wife who has been asked to use Visio by her employer. I purchased the manual based upon:
1. my knowledge of these manuals from my time as an IT trainer.
2. my wife would receive no formal training.
3. she needed to hit the ground running
4. these manuals assume no previous product knowledge.
My wife is now using Visio with great confidence and has found the book, together with the downloadable exercises to be and I quote "better than a course because I can learn at my own pace and I can use Visio properly rather than using help and hoping for the best"
Buy a copy, its a great investment, its not the cheapest but as in all things you get what you pay for.