Just for clarification, Pages will not be a 1 for 1 replacement, and as mentioned there may be differences between Word and Pages created documents, but unless you need specific support and access to
Word's more advanced features, or 100% compatibility between users of Word and yourself with no space for variation, Pages should work fine for the vast majority of users in more normal circumstances.
Editors, Publishers and other very niche users of word processors may find the differences unacceptable and the translation between Pages and Word documents less than functional, but for the vast majority of every day word processing users, and if you don't need 100% support of Word's more advanced features it should work just fine.
If you need a 100% equivalent experience to word with support for 100% of its features and functions, then sadly none really exist. Everything will have some degree of variation.
As I said, you need to actually use it, and see how you get along with it. What you need it to do, and if you need to translate documents back to Word with 100% accuracy for someone else to use or not. Its not like its going to generate vastly different things when it translates to Word, but is some use cases it may not be acceptable.