Just a (arguably plagiarized) copy of Cryptonote technology, so same conclusions as for Monero.

https://z.cash/ is the only potential solution for making metadata correlation irrelevant, but all I know about it is here:

http://zerocash-project.org/

Seems the project died or stalled? Afaik they've been quiet past months or most of 2015?

Also scaling issues will probably still apply thus it is possible that Zerocash doesn't scale to world wide use, or other problems such as DDoS. I won't know until I dig deeper into it. Perhaps they discovered such issues and stopped working on it.

Anonymity is very difficult to achieve. I would guess maybe impossible once all the technical factors are considered. But I am still willing to try. I personally will come back to Zerocash's technology later, after I finish fixing block chain scaling and decentralization (which is more important priority and more realistic).