It wasn’t bad, and it has since improved. You can train it to your voice and speech patterns. The downside is, it’s annoying to have to speak punctuation and paragraph breaks. The upside is, it has versions incorporating jargon recognition for various occupations such as medical or legal, and regional accents.
I still can’t touch type as I used to, but I prefer to use my limited-finger typing to talking. Still, it’s a boon for those who can’t type at all.
On edit: I don’t have any experience about navigating the computer. Sorry, should have read your post more closely.
“As we act, let us not become the evil that we deplore.” Barbara Lee
“Politicians and pro athletes: The only people who still get paid when they lose.” William Rivers Pitt