It says sign in but I did

Doesn't work, asks me to sign into grammarly when I already am. Browser restarts and such do not work to get it functional.

Useless.

Despite me being longed into my Grammarly account, the Firefox extension still says I need to log in. Useless.

As a non-native English speaker, Grammarly has helped me tremendously when writing important emails

I was a spelling champ throughout high school. I have used Grammarly for 4 years and it is super. I might miss a word's correct spelling when in a hurry. Grammarly picks it out and underlines for me. I go back and correct it. IT IS GREAT!!!

Very thorough platform to improve your writing skills.

ITS GREAT AND AMAZING

The add-on is very useful. Their services are good. However, this extension is not the best in terms of affecting the user's performance. Google search times nearly double after enabling this extension. Should they optimize this issue, the extension would be amazing.