I drive a Golf IV 1J Bj. 2003 4-speed automatic (with Tempo 120 is not quieter than an old diesel :-P) ...
During the trip, I spoke to a colleague in the mailbox, I could understand me better after a trip to the mailbox as during recording in the car :)
Unconditionally recommended!
... What was important to me still: The headset itself also has a micro USB port so you are not on the charger instructed (with earloop it no longer fits because that is unfortunately in)