i don't want to start a war but sorry, office is the defacto when it comes to office work and libreoffice still have many problems with formatting and editing existing .docx files (things seem better when it comes to .xlsx and .pptx) not to mention that your documents might not look similar on both due to missing proprietary fonts.
its a good software in itself its just that its compatibility with office is a little dodgy
Idk i have never worked with a complicated odt document Although, I would expect some problems because of fonts
Come to think of it. I tried that a couple months ago and The results weren't so great.( I told word to specifically save my docx document in ODT format)