So, the rule of thumb is to not buy batches of blades made after morning vodka break or after lunchtime vodka break?The problem is that they seem to have great variability in quality! Sometimes Boris or Olga don't pay attention and the blades get shipped out and are NOT the same as others...... As some mentioned, what matters is what you like and what you think. Try a GSB or Nacet... you may like them, too (with more consistency).