Video - Bitcoin Q and A Zcash in the Cryptocurrency Ecosystem
I downloaded and ran the testnet version, and did some test transactions. I read the implementation of zkSNARKs and understood 30% of it, apparently that's generous. From a scaling perspective, Zcash has significantly bigger challenges than Bitcoin or Ethereum, but it works very well collaboratively with other chains.
I would love to see Zcash as a sidechain in the ecosystem, where features are borrowed and used temporarily from each system. From Zcash you can get a better degree of privacy and anonymity, then move it out into something else. We all benefit from these inventions.