At first I want to beg amazon to finally remove ancient (from 2004, or elder from 2011) reviews for a map that came out only the 19th of Juli 2012!!! This is the 12th and most recent edition.
As almost always the product coming from Nelles is the more handy, more detailed and reliable map for the North-East of Thailand, Laos, Cambodia and Vietnam. For the planning at home I can recommend the Nelles Map Southeast Asia 1 : 4 500 000 (Nelles Map), too.
The region has been splitted in two. North comes first, when opening the map. The Southern Regions are on the back. More detailed maps of Phnom Penh, Ho Chi Minh City, Luang Prabang, Hanoi and Central Vientiane are arranged around the main maps. The roads are well indicated, tourist attractions and the most historically interesting points or nature reserves are signed out as well. I am also able (without lenses!!) to read even the smallest village's names and street names in the city maps, too. The Legend is in English, Deutsch and Francais.
All I can say after having it in my hands just now, is - buy it, try it, keep it, recommend it!