It's not a bad exhibit. The Snow Leopards are very active. The viewing windows can get foggy and muddy as the the cats (or the male at least) have the habit of stretching up on it and occasionally leaping onto the glass and pushing themselves back onto the rocks (I've observed that behavior twice...camera held in my stunned hands). The overhang over the viewing windows can obstruct the view a bit if the Snow Leopards are midway up and you are not right on the glass.
