A strange and bizarre America-worship imbues Simon’s burgers, complete with an English-only menu and the founder's manifesto written on wall in all-caps: “Accoding to Simon, there’s just one hamburger, what he ate in America.”
But: the burgers are the best I've had in Budapest. Far from Shake Shack-level, but a very enjoyable burger with a juicy and crunchy patty, enclosed by a soft bun. Simon's has several locations; be sure to go to the one in Vitkovics Mihály utca, one of the most charming streets of downtown Budapest. Note: prices are high by local standards.