So I have shaved a total of 5 times with my DE, and I have had some mixed results. I had 2 pretty decent shaves with my CVS blades. But they seemed to get worse when I switched too the derby's which I have used the same blade 3 times and it does not seem dull. But that said I'm going back to the CVS blades until I become more proficient at using at my DE and making a quality Lather. Seems like 2 variables would be better then 3, but who knows I might change my mind and switch to another blade anyway.
Happy Shaving Gents!