When I got purchased my Merkur HD, I added 10 Merkur blades to the order, and I have have been shaving with them for a week. During the course of that week in addition to reading this forum, I saw some info on shaveblog where I could get Israeli Personnas for a good price, though unfortunately the price wasn't that good, but still miles away from cartridge prices , now I've learned I've had much better options, oh well, I'll live. Tonight I did my first shave with the Israeli's and I liked it so much better than the Merkur blades. I've been reading some good things about Feather's lately and I've been tempted to get a sample pack from LetterK, but to end my rambling if the Merkur's tear up my face would Feather's rip my face to ribbons? How about the others? Thanks all.