Is the 20% easy to see out of at night time or is it to dark to where u have to roll down the windows and how much for a 2001 Mercury cougar with 2 doors, 2 little half windows, and back window?

She does great work and as the other responder said... It depends on your eyesight. I don't have the best eyes and I have 5% with no issues looking out the window at night... A little bit if I am looking out the rearview mirror to the back window

Well I have 5%, and I can still see. I guess it depends on the driver. Shouldn't be more then $200 for your cougar. She does Excellent work there also. 👌