First off, the Aero Press didn't really impress. I got rid of it - it just wasn't worth it for me. I could never make it 'work', coffee was always thin.
As far as the Bulletproof coffee, it was too 'light' for me. I know Dave was talkin about making a darker roast, but at that time his roast didn't really appeal to me. I was doing French, Italian, or Espresso roasts via drip funnel for a while and I had it down pretty good. I felt like I had a pretty rich and big flavor, but I was willing to try the low toxin approach. Didn't hold me for very long.
Also, Dave says he can thrown down multiple cups of this stuff and after the first cup (I would even thrown 1/2 stick of butter in), my stomach was not happy.
I get where he is going with all this. I've been to Tibet, I've had yak tea, I've had Chai in India, etc and the Bulletproof method just didn't do it for me.
But back to fat. I've actually moved to a high fat diet (more or less). I don't do anything low fat. I do veggies and meats and for the meats, I want the fat. My morning always consists of some sort of fat - only grass fed butter with eggs, full fat yogurt, etc - and it works for me. Nothing processed, whole foods only.
For my coffee I love Weavers. They have fair trade organic and their French roast is really good. Prob one of the darkest roasts I've tried that just has this really killer smooth, nutty flavor. I use whole cream and a little sugar. I love it.
My weight has pretty much stabilized. I'm not super lean, but I'm not super lardo either. If I hopped back on my bike, I could prob drop 20lbs in a few months. My LDL checks in at normal and my doc said nothing is crazy out of balance.
Everyone has theories and Dave's are interesting. I guess it just boils down to trying different things and seeing what works.