I have been using LanguageTool every day as part of my work and study. It makes reviewing texts a breeze and is gradually elevating my writing in the process. I have signed up for the Premium features to support the continuing development of the tool, which has become an indispensable part of my day.
I highly recommend it and their integration with Google Docs is flawless. The LibreOffice.org connection still needs some polishing, but the functionality is there. Keep up the good work!