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styled-components
Visual primitives for the component age. Use the best bits of ES6 and CSS to style your apps without stress 💅
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Depends on what you're doing. Hobby project you just need a ui for? Sure, why not. A production site for a client that needs a custom design? Probably not. Take a look at https://chakra-ui.com/ as it's a little more flexible, and would perhaps suit your needs better.
Personally, I write my own components with styled-components to style. But that just fits what I need to be doing with my work.