Mr. Herring is a certified monster! And, of all the guitarists who have sat in the "Jerry" chair since '95, my money has him as, if not the best (though I'd go with that), the best suited to the role; enough of a nod to Jer to make it fit, but without anything approaching slavish apery - and by far the most able to bring it on level of the Grateful Dead on the more adventurous improvs.
Peter