content: Libreoffice is largely compatible with MS Office, but not completely. Best case scenario for OP is he needs only to work with basic Word and Excel files. Anything "fancy" and he'll start running into issues. Plots generally don't look the same, for example. PowerPoint slides can be a crapshoot, too. Probably the biggest thing that is actually missing from Libre is VBA. If any of OP's colleagues write or record macros, he won't be able to use them.