I too was impressed by their claims that these lenses are resistant to everything. I hated having dust on my lenses and thought this would be great but soon found out that I could have saved my money and bought regular lenses. I think the coating does help but not enough to spend the extra money on them.
The sales people and doctor also vouched for them so it is very disappointing that they don’t live up to the hype.
Save your money their claims are false!