It is a nice to have toy. The extension lacks a lot of features, though.

Rephrasing recommendations are usually completely useless, sounding nothing like a human would ever write. It will not make you sound "native"

It doesn't work on a host of websites, even wildly popular ones like Reddit.

It will not fix ALL your mistakes. A lot of phrasings are overlooked. And it doesn't seem to learn at all. (Linguix recommends to change that 'are' in my second paragraph to 'is', and you cannot do anthing about it.)

I would generally recommend it, but it has a long way to go to be 'reliable.'
It is a good first glance check for gross errors.

Btw, it doesn't work in this review window.

I would love to give this 5 stars but the fact it always tries to make me write in American infuriates the hell out of me!

Let me quote YOUR description:
Linguix.com is the best way to find and eliminate spelling issues in your English texts anywhere on the web.

It is set to UK British English so I do not expect to be told that words like ORGANISED are spelt wrong because I used an S instead of a Z. This makes the entire plug-in useless!
The devs need to realise that English is English, NOT American English, just because Americans bastardised our language does not mean that we will adapt to their way of spelling words incorrectly.

If this cannot be fixed I will revert back to Grammarly which is a lot slower but much more accurate.