Well, I tried my first Gillette Silver Blue blade this week, and it was not quite what I expected! Very nice the first time out in my Aristocrat #16, sharp and reasonably smooth. The next day, same razor, only slightly less sharp. This morning, ouch! Felt like the thing had grown teeth. I took it out straight out and started with a new blade. This is the biggest drop-off I've experienced since Feathers, which deteriorate even more quickly for me (1 shave and out). I have a wiry old beard, so I don't blame the blades, but it's a bit of a disappointment.
I think the Astra SPs and Gillette 7 o'clock yellows are made in the same factory, but they both last longer in my experience.
I think the Astra SPs and Gillette 7 o'clock yellows are made in the same factory, but they both last longer in my experience.