It works pretty well, it's on beta still though, and obviously not very polished. Nonethless, the serverless p2p architecture is very interesting and is open source mostly. I see some people writing in the dev chats about integrating that tech with nostr to eliminate the need for relays. It's very interesting to see how it'll unravel. My tech expertise is not yet at that level, but I am learning more and more.

Very few use it currently but its UX is nearly good enough to replace WhatsApp and in some ways already better. The fundamental difference Keet has from Signal, Simplex, Nostr etc is Keet can already scale with no cost to bigger than WhatsApp Holepunch has been quietly working on a tech stack that's going to completely change the tech sector

Bluesky's protocol is more in line with what Keet is doing. Tbh you will either have to reverse engineer what keet is doing or wait till it's more public to know more exactly but I doubt the social bit is anything exciting, it's the P2P bits they have already opened which would be