They are very good! I've had them for almost a year.
How I use them:
1. I adjust my mirrors just to look at the edge of the door handle, and then I "pull" it outwards so that it looks as far out as possible but still sees the car.
2. I place the small mirrors in the lower left corner of the driver's side and in the lower right corner of the passenger side.
3. I position them to look at the rear wheel so that they help me with parking and I can see how close the motorcycles are getting.

I got the auxiliary mirrors for more comfortable parking, they look good during the day but at night they don't show as well, they are somewhat dark compared to the car mirrors. I would prefer better quality even at a higher cost. The adjustment method with the rotation was convenient for me.