I'll see if I can offer some advice for you, since you haven't been answered as yet.
All vehicle have "blind spots", it is a fact of life.
Some are better than others, it depends on the size of the pillars, the mirror glasses, the body shape etc.
And now some vehicles come factory fitted with "blind spot alert" etc, which can be that added piece of safety.
Personally, I would still drive using 3 mirrors, but if a car was in your blind spot, or suddenly appeared there, then the warning as a backup is worth it.
I have driven a lot of cars that I absolutely hate for body shape blind spots.
You would need to roadtest the car in question, and make your own conclusion.
Hope this helps.