They have the right idea buuuuuut...
Smash burger is reminiscent of a couple grills I favored as a kid back in the 60s and 70s... the burger, fried on the grill, mashed down making for crispy protein goodness on the exterior of the pattie... yum. And thin sliced onion rings salty sweet.... but the first thing I noticed was that the "thin" onion rings I favored were stuck together and therefore fat and greasy... also there was too much baking powder or soda in the breading... it made me feel like I needed a gallon of water to cleanse my palatte... don't bite on the special sauce they provide... go with the basics, mayo, mustard and ketchup if you're into that... Oh, and the idea that smashing the burger on the grill sears it and seals in the juices is a joke... when you smash the pattie on the grill the juices run out and coalesce on the outside as crispy proteins which is not a bad thing.
So they've evidently made a hit with the public... and I say their product could be so much better... they just need to pay attention... especially with the onion rings..........