I use Mach3 blades for years and have never changed. Even the appearance of razor blades 4 and 5 do not do their shadow in my opinion. 3 blades are sufficient when effective as these. The downside is of course the cost, Mach3 are not given. But buying in XXL pack as it allows to save some money, and it is not used in no time, Mach3 blades wearing off very little quickly. Note to ladies: these blades are cheaper than some female equivalents, and fit perfectly on Venus razors as such. ^^
