in my view, the nicest and friendliest elegant restaurant in budapest. a real understatement - no show off, just a nice classical interior, contemporary hungarian art on the walls, nice colors, great service. he food is amazing: it is more creative than what you'd expect from such an elegant place but all very harmonic and perfectly done. super wine selection!
also check out 21 across the street - it is a new hungarian casual bistro - not the fatty hungarian food, but something more for an "educated" taste