In my experience, the predictions were atrocious and not very smart, at least in French. It also couldn't detect words that had personal pronouns or determiners with an apostrophe, I had to type the apostrophe manually which is a no-go for me.

And it does not support having multiple languages at once which is incredibly inconvenient when you frequently have to switch between 4 languages when typing and when you often mix some of them.

But if you type without the autocorrect and the predictions, it can be great, I guess.