So somehow I got on the P&G email list (I might have signed up a while back to get toilet paper coupons). Today, I get an email from them asking if I would like to take a Gillette survey after which I will be entered to win a $2500 Gillette gift certificate (probably good for a month supply of their cartridges). So I take the survey and it ask the usual questions about my shaving habits, how often I shave, etc. So now we get to the serious questions where it asked me how many blades does my razor use, and after that, how often do I replace the blade/cartridge. Okay so I see where this is going now and the next question is the brand/type of cartridge, and I am surprised to see double edged blade as an option. I select that and the survey thinks for a while and then pops up the screen "thank you, that's all the questions we have". I am still entered to win the $2500 gift certificate, but doubt if I could redeem it on ebay for a vintage Gillette Aristocrat OC, or even Gillette of India for a supply of their Guard razors.