I was a little iffy, and went back and forth on the disc idea. On one hand, it has a very space age feel, which matches with the tesla. On the other hand, it has like a retro 50s disc feel that people used to put on the old classic cars. I wasn’t expecting a lot of mileage improvements, but they came. You won’t see any change through town, but on the freeway, I saw a difference. I travel 45 miles each way for work, all freeway. I used to use about 53 miles of range for my 45 mile trip (no heater/AC/lights). Now I use about 50-51. This was over 8 trips to work so pretty consistent. Not a MASSIVE improvement, but any improvement feels massive to me. I would like to post a photo but don’t see a way of doing that. Try them, you’ll like the looks if nothing else.