Really, a reflection can stop working. /sarcasm

It'll stop working when the person in that lane clips you and you wreck. I was always told never to rely on mirrors, they are there to assist you, not so the driver can be lazy and not look.

I've actually never found the Crossfire to have a bad blind spot because the rear end is so short. Only when I first got the car and wasn't used to it did I feel it had a bad blind spot. Maybe that's cause my mirrors are adjusted properly and I look too, I think $75 is a waste of money and as stated above, proper mirror adjustment should fix any problems.