As usual, traveling without a guide it would have been much more difficult. HOWEVER, IT had wrong information: For Example, it Said the capital of Sumatra (Medan) had only one airport, 4 km from the center of the city. Guess what? WRONG. Actually it had two (the second one 50 km away from the city!) And the one which Mentioned only for military use !!
Besides That One and someother small things, good guide.