Now to the Wake Up function. First I thought it was good that the unit "remembers" that opened the bag and is probably turned on by a magnetic switch. But if I now the front cover flap back and rest from behind the bag let (normal use of the device for reading a book) the unit will always times again and out. The reason is that the magnet in the lid which is probably too close to the magnetic switch is located in the Kindle Fire and the Fire thus thinks the case would now be closed.
I am surprised that I have read nothing about it in the reviews, perhaps the magnet in my pocket and just too strong? Thus, the bag goes back however.