The darker ones are very dark, and make checking my blind spot a bit difficult

I am still able to see behind my shoulder when checking for blind spots and it isn't an obstruction in any way

We usually use them on the backseat windows for the kids but they block the blind spots in the car and make it almost impossible for you to see this area when you need to

So if you have blind spot monitoring, this is for you

Also, gotta get used to driving with these on the back passenger windows as they do create a bit of a "dark" spot - but come on, you have to expect it when getting these.

Here's where it loses 2 whole stars: you can't see through it when you're checking your blind spot

so I cannot see out of my blind spots while driving

The shades create huge blind spots

I ended up removing the one behind the driver side because it created a blind spot.

There was no blind spots.

Blind spots are visible through it, just needs some getting used to