Let me grab some text from a private email I sent out a short time ago...
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In all actuality I may have to grit my teeth and admit that PADI might do a good job here. I may vehemently disagree with their deep air technical program but PADI does a bang-up job at teaching materials, so it might be a decent class. ANYTHING would be better than the IANTD mixing class I took a couple of years ago!
My friend said it best about the IANTD text that accompanied the class: If I had handed this in as a term paper in college, I would have flunked.
As a secondary effect, I expect a bizillion PADI badge collectors to take the mixing class, which will backfire on some shops because all of a sudden their customers will be informed about mixing.
Gone will be the shops that tell customers that in order to mix Nitrox you need to sacrifice a virgin chicken over each cylinder, and thats why they need to charge $30 a fill. Also being a two way street, customers will realize that if the shop does PP blending, at 30-60 psi/min for the O2 that they cant get a Nitrox fill done in 5 minutes.
Roak