Once again Mufflex exceeded my expectations. My power window failed suddenly in a mid-way open position, leaving my Jeep open and vulnerable. Mufflex told me to drive right over, diagnosed the problem (the window regulator), ordered the part and repaired the window while I waited. Giving me complete peace of mind knowing my Jeep was once again locked up tight and secure. Not to mention removing any concerns about rain getting in the open window and doing interior damage.