The first time I saw it, I sat row B of rear mezz all the way on the right. You see everything, except you can see into the wings, which is slightly amusing.
And I've been able to see the action that takes place offstage from there as well.
And yaay for GB loving
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli