A friend in California is a fan. He has turned me on to some other excellent wines so I trusted his judgement on this and was able to find a bottle of Tynan's 2012 Cab Sauv St. Helena Reserve. Since then I've also bought some of the 2015 vintage.
But to answer your question: no, I have not tried his wines. That bottle of 2012 might hit its drinking window in another 5 or 10 years.
FWIW, Galloni hasn't been overly impressed with the wines with scores ranging from 88-91 and notes like "this jammy, virile, forbiddingly tannic wine comes across as flat and one-dimensional".
I'm hoping he's wrong. 😂