Castell has become my #1 steakhouse in amsterdam. We used to go to one of the chains, but since we've discovered Castell we dont go anywhere else and try to visit once a month at least. The ribs are especially good. The only thing that I personally dont like is the low seating, so we always try to sit at the bar. We even go so far as to go somewhere else if we cant sit at the bar. But your mileage may vary, plenty of people seem to like the seating.