I found onlyoffice to have the best compatibility with documents imported from/exported to MS Office. For most people, their coworkers/teachers/professors or whatever will be using MS office, and if the formatting is borked everytime you move the file between libreoffice and ms office users, it gets old fast. That was my experience with libre office and why I ended up on onlyoffice. Of all the suites i've tried it has the best compatibility between itself and ms office for formatting.