LibreOffice 5.0.<something> is quite identical to MS Office. It has a look-and-feel like older Office 2003. You can read and save documents, spreadsheets, presentations in MS formats, but, as always, there is possible loss of some formatting. Why? Because MS Office is NOT open source. Microsoft owns it, lock-stock-and-barrel, and they can and do change file formats from time to time. As I've stated elsewhere, think of LibreOffice as Charlie Brown and Microsoft as Lucy holding the football.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic