I get pretty much the same performance every time from Gillette Silver Blue, Nacet, Astra SP, Crystal, and Feather, but I bought 100 Israeli Personnas and am finding them kind of inconsistent. Most tucks are fine from top to bottom, but a couple have had several blades that have been prickly and short lived. If I ever buy 100 of anything again, I'd like a high level of confidence that they will be consistent. I realize quality control cannot catch every issue, but I would love to hear if anyone else has encountered this issue with any specific blade(s).