it has started to delete spaces between words after corrections

Fajne!!!

works fine, but is heavy on performance

This extension is great! I bought the whole program, and it has been increasing my grasp of grammar. I'd give it 5 stars if it worked in more programs and websites.

хорошо помогает в копирайтинге

Pretty handy. Pretty good.

вполне неплохо работает

Muy buena herramienta.

Très bon correcteur à la volée. Il propose parfois des modifications qui ne sont pas adéquates, mais on a aussi un cerveau pour ne pas en tenir compte.

I have ProWritingAid Premium, which supposedly gives me the capabilities of this Add-on but I turned it off--will use it for large volume writing and editing--and bought the Pro version of LT instead for everyday use. It is really efficient on PC resources! That is a big deal for me. Apps that cause my PC to buffer or hang up kill my flow and productivity. I wished LT Pro had a writing level complexity rating, a la Hemingway Editor. The annual fee is not cheap either. My Lifetime PWA Premium license is a vastly superior deal. However, for efficient writing assistance and supervision, as you go, this is showing itself to be a standout tool.