To put it in perspective, i currently drive a 2010 Hyundai Accent. I like the car, but the blind spots are pretty awful. It seems all the pillars are too big or in the wrong spot. To make me better aware of the cars i normally can't see well, I dug into blind spot mirrors. I've now tried large and small round mirrors, a partially round mirror, and this rectangular unit. I came to the conclusion that this one is ideal for cars with small mirrors.Round mirrors give you a wide view of everything. Since i'm less interested in any aircraft that may be following me, round mirrors turned out to be a giant waste of space. The useful portions of the mirror were relatively small and my preferred 3" mirrors took up way too much space. With a round mirror, 1/2 of it showed me my own car, which isn't likely to crash into itself. This rectangular mirror effectively cuts off the top and bottom of a round mirror, giving you the ability to see quite wide, without taking up a lot...