Extremely bad. Maybe one out of twenty problems it finds is an actual problem, the rest are false errors that ruin the grammar in your text.

Just straight up does not work anymore. It's run into the infamous chatbot problem where it peaked before slowly degrading into nonsense. Many programs like this have been having the same issue so good luck finding one that still works, especially after the "AI boom" that made any automated computer program unusable.

Tried it and found it to be more or less useless as any grammar corrections require a premium subscription.

Why does it sometime just quit when I'm doing my work?

Ne fonctionne absolument pas chez moi. a pris le dessus sur le correcteur de gmail donc plus rien n'est corrigé....

I used to be a HUGE Grammarly fan, but since they're now using your data to train AI text generators during a writers' strike, consider me an opponent. HIGHLY recommend you uninstall this extension, and cancel your membership if you have one.

За непрофессионализм.

grammarly does not work with firefox.

some times will edit your words into some blst that you even don't think of ...

I can't take Grammarly any more. I spend more time fixing Grammarly notifications that are errors than my own spelling and grammar mistakes. I've switched over to LanguageTooler and absolutely love it. I've been a Grammarly customer when Grammarly first came out. It was great back than. But, it's A.I. is more of a headache than a helper.