True to Gillette for years, it is a great pleasure to have been able to try the Fusion Power Razor Blades X 12. It is both amaze and tiring to see the evolution of the blades annually. Each brand continues to offer more and better to add comfort and efficiency and Gillette seems refine its evolution but it is not always necessary. In the case of these blades shaving is clear, precise and very comfortable. It's been a while since I had not purchased and I used an old blade for months, then yes it still cut as close but was in pain as she pulled on the hair, so that when these blades are new .... one can tackle a beard of several days without any fear. Personally I do not use the POWER merger but the simple fusion and it is already perfect, the blades are compatible. Last on the 6th blade, I never really had any use I find it more marketing than functional. I think it adds the most value for nothing. What I do not like is the race to the number of blades that there is between Gillette and Wilkinson from Mach 3 via the QUATRO to reach 5 blades + 1 other ..... it is why I take off a star and for the price too ....