After installing AutoVentshade Ventvisors and waiting 24 hours with windows in the up position, I lowered all windows. When I tried to raise each window I found three of the four vent visors would not let the window return to the up position. Only the drivers side window would return to the up position. The only way I can get my other three windows to the up position is to hold the vent visor out and raise each window from that location.
I WOULD NOT RECOMMEND THIS PRODUCT TO ANYONE!