Any blades you won't buy again?

Think I’ll end up adding Astra SP to this list. Although I started off using it, since trialling other blades and then going back to it, today on my non-shaving day my face has been ridiculously itchy for most of the day. I’ve been resisting the urge to scratch it, as the last thing I need is a red raw face, but it’s like the feeling won’t go now until my next shave tomorrow. Could this be something to do with the platinum coating?
 
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