I saw the Hydro 3 and Hydro 5 on the supermarket shelves. I cannot justify spending so much on razor blades. Firstly I have to finish my blade arsenal. Secondly, five blades is far too much for my head. Its like using a fork lift to lift up a brick - Overkill. But I do have thin hair, so perhaps that is the difference.
My Double edge is all I need.
But, yes, these do look like nice razors.