It's close but not quite beef yet; still made for a solid burger.
The patty tasted very similar and flavourful (though lacking some beefy savouriness), especially with the smokey char straight from the grill. But mouthfeel was slightly off, though still a decent replication of the firmness and density. -
Naturally, Three Buns make good burgers and their immaculate grilling, the cheese, kethcup and pillowy buns made the patty shine. Still, the price tag is steep, so take that into consideration.