This is one of the worst editions of Lonely Planet books I've ever read.
The book is full of factual errors which probably is a result of poor research. I doubt that the researcher actually have been at some of the places, and that he has copied information from the Internet instead.
I traveled this summer in Tanzania, and ran into errors in this guidebook time and again. The Rough Guide was far more accurate, even though that book is two years older.
I can accept that phone numbers are wrong, given the constantly expansion and changes in the Tanzanian mobile phone system, but addresses should be right most of the time.
Further more, I can accept that travel times can't be relied upon as accurate in Africa, but if the journalist had actually travelled the distanses himself, he would have noticed things like:
Travel times for bus companies are given to the region, not necessarily the city it self. That can mean a lot of difference given that the regions are huge.
The slow ferry to Zanzibar does not take 3 hours as stated in the guide - however if you ask at the ticket office they will tell you that. The slow ferrys are all old freight boats with an extra deck, and they take between 6 till 8 hours on the entire journey.
Several restaurants in this edition do not exist, or haven't opened yet. Given the lack of information on the food and service I doubt that the journalist actually bothered to sit down to eat at the places mentioned in the book.
Shopping districts mentioned in the Dar es Salaam chapter does not contain the type of shops mentioned. For instance, there are virtually no curio or souvenir shops along the Samora avenue, even though the book claims there's a whole lot of them.
The research behind this book is just so bad that it can't be relied upon. Get the Rough Guide instead - it's much better!