ZCash requires a trusted setup, takes a 20% fee from miners, and active mixing requires 8GB of RAM.
https://blog.okturtles.com/2016/03/the-zcash-catch/
http://weuse.cash/2016/06/09/btc-xmr-zcash/
If you are interested in anonymous blockchains, I highly encourage you to look into Monero. It meets or exceeds that of ZCash. And Monero's RingCT is currently implemented and in use on TestNet with a target "go-live" this January.