Groupon advertised and sold me what they called Gillette Fusion-Compatible blades and did not mention that they were generic knockoffs. The cartridges in the photo look exactly identical to the real ones and I honestly believed they were genuine Gillette Blades. I started to use one of them and it immediately felt on my face like I was shaving with a dull four week old cartridge. I am going to demand a refund from Groupon. I feel that Groupon was deceptive and should have used a stronger warning