Barely noticed it. The only time most people would use that are on long road trips, which I only take about twice a year (most of my road trips are between 100-200 miles one way, which can be done with filling up at the destination). So if I used L3, it was for 30 minutes while grabbing lunch on the road and getting half the charge "filled." 99% of my charging was L2 at home or at destinations.