B|J et. al: I'm loving the Yama. I drink so little coffee at home (but what I drink at work, at church, and elsewhere is generally my own beans), but when I do, of late it's been in the vac*. I'm still dialing in my brewing variables; accustomed to the Aeropress's insanely easy control of variables, I'm finding the Yama to be a bit more of a sports car -- tighter steering calling for more care in nailing the grind and the timing of stirring, etc.
Too fun.
* Months ago, it was all about espresso at home. But this winter I've been doing few roasts, and counting on frozen assets. I've focused on light roasts, so the Vac pot has replaced the espresso for the most part. Some darker roasts at work just get done in the Aero or, by golly, occasionally with a fine grind in the company Bunn.