Well…
I have never used psychoactives of any sort, not even been drunk, don’t smoke and I’m near vegan, so maybe this makes me sensitive.
I, after some consideration, decided to go a bit against my habits since I haven’t had so many lucid dreams lately. I ordered 25gr of pieces of the root from a Dutch webshop.
I decided to try this out, since it was not supposed to affect waking consciousness, and didn’t seem that strong- reports on efficiency are vague at best.
So I chewed on a small piece (maybe less than 1cm long, and very thin) around afternoon, since from what I had been reading I got the image that the active substances go slowly in the body, and you need to build the amount of them up anyway over a period of days.
Then before going to sleep I chewed on and ate an another even smaller, maybe 5mm piece, that was also very thin.
I slept pretty normal, remembered one very ordinary dream upon awakening.
BUT
It was still night, and I realized I’m thirsty so I stood up, and almost hit a wall when I tried to walk because my head was swimming so much.
Gradually over a course of one hour I had a growing sense of vertigo and general feeling of sickness, that was very unpleasant.
I tried enjoying the feeling in my head, and tried different meditation techniques, but didn’t get far because the intense feeling of vertigo and pressure in my head made concenctration impossible.
At some time I started to tremble, and my heart was racing at about 200bpm.
So I decided to stop trying to sleep more or anything, and stood up. Taking a walk out in the freezing air with car noises and stuff to keep my attention helps keep my mind together, and now that I’m writing this, I still need to concentrate a lot to hit the right buttons since my body coordination is slow and inaccurate, and my head still starts to swim like mad if I close my eyes.
So maybe I’ll get back to the aftereffects, if any, later this evening 
But, thus far the experience has been most unpleasant, and I urge sensitive people not to take seriously the claim that this stuff does not affect the waking mind!