Broker Check for TastyWorks: https://brokercheck.finra.org/firm/summary/277027
The officers aren't particularly distinguished in terms of pedigrees, but they are "doers" -- Sheridan notably, who is a proven quantity in directing platform development (including mobile apps). If they can get the commissions down to a manageable drag, I might give their platform a whirl. The site claims functioning browser-based and mobile apps will be available right out of the gate, based on Dough's GUI. (Sometime in January 2017.)
(Although I'm not a fan of Dough, having robust browser-based and mobile platforms is a huge advantage for me, since I work in secure areas that will not allow me to download standalone ONE software or run it from a flash storage device. I'm testing the ONE now, linked to IB, in anticipation of a quick divorce from TDAmeritrade after taxes.)
Sosnoff is super creative. He also knows that execution and costs matter. It would be a big middle finger to the guys over at TDAmeritrade if he and his team pull this off, and with lower commissions. When TDA bought thinkorswim, I heard they wouldn't let Sosnoff near an executive position with any real authority. Probably just made him more determined.
TDA and IB are due for some disruption. I'm already tracking the Tradier/Livevol Core thread. Very interested in that as well.