02-09-2008, 08:15 PM
I'd recommend trying out the demo of iWork on the range of Microsoft Office documents that you are curious about. As you can imagine, the quality of the compatibility will vary with the complexity of the Microsoft Office document and the range of features it uses. iWork does not have complete feature parity with Microsft Office so there is no way it will be completely compatible for all uses. Each user has to evaluate for themselves if it is good enough for their needs.