One otherwise clever feature that's been dinged by some users is the ANR circuit's tap control. Double-tapping a finger on either one of the earbuds puts the set in a talk-through mode, which works when the headset is in the medium or high noise-canceling profile. The idea is to enable better communications outside of the headset. Maybe it's for talking with a flight attendant, gate agent or passengers, but the talk-through feature means you don't have to take the buds out of the ear to talk with someone off the intercom. We've heard of (and experienced) some situations where the tap-through is activated uncommanded during landing and even on the takeoff roll on bumpy runways. Bose said the Series II has been tweaked so the mode is more accurate and more responsive.