I have bought at least 5 of these mirrors different sizes and styles. I drive in Los Angeles and its pretty hectic. Cars are always in your blind spot and you have change lanes all the time.This size 400mm is enough to cover the rear and most of the right side my head blocks most of the left but in my hatchback this is helpful. Another thing this is a flat mirror i dont like the convex style as it shows too much of the inside of my car vs out the window.On glare its not great many cars have led lamps and a lot of idiots with high beam on this doesnt do alot but its not as bad as the small stock mirror. 20 is a little expensive but in 21 what can you do. I like the finish meani g the edge of the mirrors is not very noticeable vs some of the cheaper ones i tried. If this had the nlue ti t that would help on the glare but I needed something quick
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