JSON support status?

Has anyone successfully used ShareJS with JSON support? We're aiming to do OT on very large and nested JSON trees.

There's this wiki:
https://github.com/share/ShareJS/wiki/JSON-Operations

Which points here:
https://github.com/ottypes/docs/wiki/JSON-operations

Which points here:
https://github.com/ottypes/json0

Known of these seem to indicate major issues with the JSON type support. However, there's this following line in the code which indicates JSON support is buggy:
https://github.com/share/ShareJS/blob/master/lib/types/index.js#L8

Any guidance?

Thanks so much!
-Ryan