I REALLY REALLY REALLY like dropbox paper. The interface is so nice and distraction-free, but having an in-built spellcheck would be just *Italian hand kiss action*. I have used Gsuite, Microsoft word, even Libre Office. Dropbox paper is really a class A product but without the spell check, it becomes a pain to use multiple apps to work with it. I also use Microsoft edge and the browser's spell check is completely unusable in paper. I pray to the dev gods to bring me spellcheck.