Shadowcash including it's market, communication and anonymization features is in the making for a long time now. If ever finished it would make the 3 or 4 applications (services) obsolete we are using today. Bitcoin, TOR, PGP and Tumbling would be unified in one application and one graphical user interface.
Considering there are no general security concerns (i.e. bad code): Would you give it a try?
No. They can't say who the cryptographer is on their team, and they pooled some money together to get it audited by Isidor Zeuner which never happened. Their blockchain a few months ago was deanonymized by Shen Noether who only then helped them fix the bug after the paid him a bounty.
No I don't trust them.