Joseph Hellerstein has a series of posts on CRDTs: https://jhellerstein.github.io/blog/crdt-intro/

He very much leans toward them being hard to use in a sensible way. He has some interesting points about using threshold functions over a CRDT to get deterministic reads (i.e. once you observe the value it doesn't randomly change out from under you). It feels a bit theoretical though, I wish there were examples of using this approach in a practical application.