As you may know, at the forefront of every travellers mind is weight. When travelling around the world you really don't want to lug this through america, canada, mexico, the pacific, new zealand and australia before you get to SE asia! I ended up leaving this at home due to it's weight. Maybe when the kindle version comes out this will work better?
As for the content, it's ok, but it is very brief. You can't expect a book to cover the whole of SE asia. My advise would be to get individual books, or browse websites and come up with a brief itinerary and then talk to tourists and locals whilst travelling and get recommendations of places to stay and go when out there. The last thing you want to do is lug a heavy book around all over the place!