I'm not a big fan of smashburgers compared to thicker, but Lua's smashburger is superior imo.
I have worked many a grill....the reality is a smashburger is going to taste better or worse based on who is on the grill.
To many think the objective is to get it super thin....when in reality you do need some meat to bite into.
If I am making it for myself I am going to use to half pound balls and press them just far enough that it shrinks to bun size and then double stack them