Useful and I haven't experience any problems.
One little thing though. When I use "Add to todoist from context menu, it adds CURRENT page regardless of the place I clicked with right button. If I am "adding to todoist" by clicking in the background of the current page that's OK. But when I right-click on link and "add to todoist" it is expected to add the url of the link, not the current page. It's how Pocket and internal bookmarks for example work.