MetroplexJim,  on your advise I “dined” at Twisted Root.  What an operation!  They really know how to manage a restaurant.
 
Great burger, cooked just as I like.   (But I still like the char-grilled taste of Del’s and Del’s root beer I find better)
 
BurgerFi crossed the Arizona/California state line!  A lot of great fast food places don’t.  But Napa?
 
What do you think about the branding of the bun?  Umami Burger does that here.  I think while cute the first time, it just ads more human handling to the bun.  Not necessary.