I liked this add-on very much. It caught my mistakes as I worked. Unfortunately, Firefox is blocking it now. Shame on Firefox.

Big help to me! definitely improves my writing!

A pesar de tener un plan gratuito bastante pobre (pocas opciones, pocas ayudas y muy poco escalable), la extensión (y la app) en sí funcionan muy bien. Si tuvieran mejores planes de precios sin duda me plantearía suscribirme.

Grammarly does make a few mistakes now and again but overall it has improved my writing.

Great extension and app. It really helps when writing paper, emails, etc. The one down side is that google drive is not supported. This is really inconvenient because you have to do a lot of copy and pasting back and forth between google and the app/website.

A bit difficult to navigate.

As someone who's terrible with grammar and spelling, this extension is a godsend. Sometimes it gets confused and tries to fix something it shouldn't but it usually works and when it suggests something it doesn't need to it's easy to deny or just ignore.

If you have the free version, this works great, but there are some things that you can only do by paying. However, it is far from perfect as some things it suggests don't sound natural or don't work the way it does in the document. Meaning that it will sometimes want you to remove or add a word but it isn't the right place to do that. This still allows work on your part as a writer as you get to decide what is necessary for editing and what isn't based on what it is you are writing and why. I like that the ignore button is there for this reason.