Highly recommended by Peter, who wrote a memorable email to us last year on the subject, in which he used the words:
Oh. My. God.
Slience. Library quiet. Peaceful sleep. I slide the panels closed and feel like Charlton Heston in Omega Man, cloistering myself from the barbarians below. My favorite part? I bring guy friends in, show 'em the window, and say: "go ahead. Hit it. As hard as you can." All you hear is that dull whack of knuckles hittin' half-inch thick glass.
New York Mag says: The Best of 2004 - "The company can hush just about any type of window without affecting the style of the original panes or their operation."
(Note: This is an update. First reviewed on 4.09.04)