"..It definitely overrides natural feedback. My experience has been unoptimal. It definitely gives me an initial caffeine type high for the first 2-3 hours, then after that I can tell that I am locked into my head. It becomes difficult to access physiological resources.
I am experienced with accessing states created through my physical body such as summoning energy simply by putting my body into a more confident posture, etc. As well as consistently listening to what excites me the most in any given moment.
The modafinal "locks" me into my head. It becomes difficult for me to draw my consciousness down into my body and have the level of beneficial feedback/energy I am used to from my physiology.
I can definitely see how this may help for studying dry facts and logical content, but it definitely decreases what I can only call emotional intelligence. I have to deal with people on a day to day basis and emotional intelligence is a huge part of my success in these interactions/communications. I become prone to "negative states" much more easily. Such as impatience, resistance, lack of empathy, and ability to remain open emotionally."
https://forum.bulletproof.com/discussion/3754/brain-fog-on-modafinilJust as i thought. I'm staying away from this. I prefer the clear state of mind, as you have after waking up well-rested.