I've always thought the only reason for Steak n' Shake was their shakes, which are stupidly expensive but occasionally worth it. Their burgers...meh. They're not bad, but they're overpriced for what you get. The only reason I ever eat one is if I'm going for a shake and need food as well. I'm never disappointed because I don't expect much in the first place, but I'm never impressed because it was better than expected either.
I just find it funny the last 5-ish years how EVERYONE is doing mini-burgers all of a sudden. Because somehow you feel like you're getting more food when you're actually getting (maybe) as much meat, but with a bunch more bread? Me, I'd rather get a real size burger instead of filling up on hamburger buns, but to each their own.