I am fan of Lonely Planent Encounter guides as I travel a lot in cities around the world for work. Very often I get to stay there for three months and therefore I fing Encounter guides very useful for me with all the nice shops and bars/restaurants tips given by locals.
This book is full of outdated information even though is only from last year: many of the bars/cafes/restaurants mentioned are closed. Second, many addresses are wrong. Third and most important: all the shops, bars, cafes and restaurant mentioned are really REALLY tourist traps. I do not think the author is a local at all (if she is, she hanging with tourists all the time). Also, I did not find any value added in this guide book than any other Istanbul guide book.
When I buy encounter (I have London, Tokyo, Berlin, Rome and they are top notch) I expect a different level.
A new author (please a local this time....) should completely rewrite the entrie book.
This book is a loss of money and TIME (you will loose time looking for the shop/restaurant she mentions finding out is either a tourist trap or wrong address...)