For many years Zeller was located in a most impossible basement venue in the outer part of Budapest. Yet they became so popular among visitors that scoring a reservation was one of the biggest challenges facing Budapest tourists. In 2017 they moved to a bigger, trendier, posher venue in downtown, but seem to have remained loyal to their founding principles: serving locally produced, updated Hungarian dishes with a cheerful service staff. Rather than the over-promoted goulash, Zeller's creative Hungarian cuisines include the delicate rose duck served with celery and baby carrots, and the tender pork cheek that comes in a paprika sauce. The wine list consists of bottles from small local wineries.
It's too rare a phenomenon when food, drink, and the service come together so naturally. Given the central location and high prices by local standards (main dishes above €10), however, nearly all patrons are tourists, which can detract from the local experience. Advance booking is recommended.