I also own the latest edition of the National Geographic atlas and the 2000 edition of the largest Hammond World Atlas. While the latter have their strong points, I'd rate the 11th edition Oxford as the best general-purpose world atlas, and the Amazon price is certainly right. I ordered mine "next day air" to minimize shipping damage but its good packing would probably have kept it safe even via UPS ground. However, I still recommend 1 or 2-day shipping for buyers particular about book condition--- this is a very large, heavy book!
Besides the excellent main map section, the Oxford has an extensive introductory section with all types of specialized maps and related data. Furthermore, the atlas's index is well-organized and extensive. The maps themselves are unusually legible and don't require squinting to find towns, rivers, etc. The book is an invaluable reference and also a work of art. A "must buy" as far as I'm concerned!