React + Firebase Cloud Firestore.

For those following this, I've started to implement Rebass into my project. It was very easy to start using with create-react-app, no ejecting or custom webpack plugins etc. It gives you a good minimal base and uses styled-components for easy customization. So far I am really enjoying it! If I hit any snags I'll let y'all know. http://jxnblk.com/rebass/

I did look at Grommet as well, it looks pretty good. Not sure how much I can weight I can put into something from HP.

I have been looking at the Ant Design docs, it seems to have some promise. Anyone have experiences to share about it?

Thanks for the recommendation, I'll check out spectre.

Semantic UI does look really nice, but I'm not sure I want to use something that is pre-V1 and under heavy development :(.