I have sat in the balcony of Carnegie Hall.
The sightless are great if you are center. If you are on the side of the horseshoe shape you really miss half of the stage and often the front of the apron. If someone in front of you leans forward your sightline is pretty much obscured. It is very far away but, as in most theaters, since the sound is reflected off the ceiling, you hear better than if you were in the orchestra.
Remember, unlike Broadway which uses Rush tickets as a marketing tool, there is no reason for a presentation at Carnegie Hall to put tickets aside for Rush patrons since there will be very few performances of that event and they may as well sell the tickets in advance if there is a demand.
Carnegie Hall is a glorious piece of architecture and concert hall, it is not to be missed.
Updated On: 2/4/16 at 06:28 PM