Simple Green is the new WD-40! The product some people love to hate! Personally, I'm a fan of both! Can't say I'm a fan of water based cleaners for heavily greasy/oily cleaning, though. I prefer to start with mineral spirits, or at least some citrus based cleaner solvent. Move to water based after most of the grunge is gone.

And hydrogen embrittlement from soaking a chain in Simple Green? It this what some are worrying about these days?