If you get the papa you get two beyond meat patties for I believe $7.50. I get it with cheese so its $8.27 exactly. Not tried with grand papa, though I might if I'm really hungry. Three beyond meat patties in one burger would be a feast.
Still not cheap but not out of this world and it is very filling. Plus I like supporting A&W for being brave enough to bring this across the nation personally. I think what they have done will accelerate more products like this in our market (please Quorn, do it!)
Extra note: They will do a double buddy burger I think for about the same price as papa (single buddy beyond is $4.20 I think + extra patty for 2.99) but papa seems like better value, not 100% on that. They were saying something about the bun being too small when I was trying to order that so just got them to do papa instead.