Don't know much about m-cresol (yet ), but hope we don't look back in twenty years saying that! .
I found the addition of zinc in nph, which can cause hypounawareness really interesting as pointed out by Deus. I get sudden drops, that can be a little overwhelming at times with novolog, but my sugars are always above 80 mg/dl. I wonder if I supplement more zinc I can maybe not feel those swings as much.