I got a tuck of these in a sampler. Not the worst I ever used but I was expecting something a bit smoother/sharper. If I corked them they were OK, but I don't want blades that need to be corked. All the blades I like or love are fine right out-of-the-box. The exception was the Vidyut Zorrik which was a bit rough but smoothed out nicely after the third stroke or so.
My advice: Keep searching; the world offers many varieties!
My advice: Keep searching; the world offers many varieties!