Sonic Drive In, How Does it Work?

I'm watching the Farts'R'Loud episode in which they turn a Camaro SS convertible into a spokescar for Sonic. Never heard of that chain.

Is it a "press a button and the machine nukes some cold stuff for you" kind of deal, because this is what I gathered from googling? Educate me!

Is their stuff any good, or is it like a "I wouldn't touch it with a ten foot pole" kind of thing"?