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To be honest, I've studied this whole mixing process a lot. This really could be my experience, but I wouldn't pay $150 for this like it costs brand new. I WOULD pay the $25 to rent both disks, though! What a bargain!
The video talks a lot about theory, so if you don't know much about mixing, this can make your life 1000 times better. If you DO know about mixing, it's an interesting watch, and it's cool to see how he shapes his mix, but the actual techniques come from experience. He hardly says specifics within the plugins he uses, but he does talk a lot.
It's a good rent for $25. DEFINITELY get it. But don't pay $150 for it.