If you set aspherical mirrors properly, you can see three lanes to each side! Even the 17 vs 45 degree pics above show proper adjustment- with the edge of the car just outside of the reflection. That's nearly 2.5x the reflected area of a standard mirror. If the idea of a mirror is to reflect as much area as it can providing the most information ab what's back/over there, it's impossible not to benefit from the wider angle glass.

I agree with others here that they are one of the best things I have done to my X5. I wasn't adventurous enough after 7 years in my 3.0 (sworn no mods on purchase), but I still enjoy in my E39 after 14 years and only 5 or so in the 4.8. The more the mirror reflects, the more you see.

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