As big of a change NTFS was (as you´ll see), Microsoft has managed to deliver a high-quality file system that shames FAT (16 or 32), and easily rivals the other systems UNIX flavors use. And they have managed (by maintaining 8.3 truncation support) to do this in a way that legacy apps like WordPerfect 6.1 can still run on top of it. In short NTFS is an example of something done quite well.