Now here is the bashing part: cryptonote ring signatures cause a lot of blockchain bloat. The SDC implementation compounds this problem with the clunkiness of a zero-coin type token system. It's a great proof-of-concept, but in my opinion, it's not going to be practical. I could be wrong. Time will tell if it gets adopted, used, and is maintainable.
I posted a set of questions regarding possible "bloat".
iirc they have done something clever about this.
https://bitcointalk.org/index.php?topic=745352.msg10721642#msg10721642XMR/Monero uses very small ring sizes (default 3) to shadow (default 16!) because of "bloat". The question is have the dev team found a way to minimize bloat?
Awaiting a reply.