this stuff is worth more the gold if you give a crap about you paint job on your car. never use anything but this.

Good software, but a terrible activation system. I had to register the product and set up an account before I could activate it, since the initial activation page does not allow you to enter the entire product serial number and it said that my serial number was invalid until I completed the registration and was able to enter the entire product serial number.

Sprayed on liberally 2 months ago - have yet to notice an improvement in my streaks in my shingles, but will remain patient as other reviews have indicated it may take up to 6 months to notice the improvement. As I have some left, I will try another treatment in the spring if by that time I still haven't seen an improvement.