If I have a well-honed blade that shaves well, and I strop it correctly and do enough passes, the blade stays sharp (shave ready) for a month at least. Maybe that is because I always strop 100 laps minimum and do use some pressure (with proper technique) while doing it. I still say that a SR won't be quite as sharp as a DE blade, and my Feather SS proves that to me every time I use it. I stay with SRs, though, because the difference in the shave is minimal (both methods give great shaves) and the SR blades are just more fun to use.