I had Smashburger for the first time a couple of days ago and I was not impressed. My burger was way too greasy. The smashfries were good but they were greasy as well. I'm not expecting for my burger to be dry but there is a major difference between juicy and greasy and they crossed over into the land of the grease. And they were heavy handed with the salt. Unless I want my sodium intake for the week in 1 day, I would suggest that they move away from the salt.
They are similar to Five Guys in that they have no combos but they have more options. I can see what the appeal is and maybe the cook was having a bad day but between the grease and the salt I will not be going back unless I have a death wish.