I used antd at a previous company and I thought it was very nice from a design standpoint with a good look out of the box.
Development could be a little clunky with some things difficult to customize, although I think that's gotten somewhat better. I also remember a few things having Chinese documentation but missing some English translations. Haven't used it for a few years so not sure if that has been more filled in or if there are more English speaking maintainers involved now.
The mobile component library was entirely Chinese when I used it 3-5 years ago. You could still build responsive webapps using the standard components with English docs, though.
Development could be a little clunky with some things difficult to customize, although I think that's gotten somewhat better. I also remember a few things having Chinese documentation but missing some English translations. Haven't used it for a few years so not sure if that has been more filled in or if there are more English speaking maintainers involved now.
Still think it looks nice visually overall.