loaded a personna blade in my fatip expecting good things, i have tried these in other razors and they were a great shave, the fatip has always been faultless,started shaving and it was dragging like a old blunt blade, ok i thought its a duff blade,before tossing it i put it in a rocket hd and started shaving, the result was a smooth clean shave,i was hoping the blade was a duff one as i have heard the fatip and personnas were a good match,but this was not the case with me, its a funny old game this de shaving at times.