I got some of this, from south africa from a trusted vendor. Yesterday I gave it a shot... I tried 400mg sublingual first, chewed on it for a while and swallowed. I started feeling a warm glow at first, but it didn't progress much after an hour and a half. In truth it wasn't entirely comfortable. No euphoria and a sort of weird hazy feeling. I added 400mg orally, and an hour after that it got stronger. But I didn't really like it. There was no euphoria at any point. No stimulation or sedation either. It just made me feel kind of slow in the head with a somewhat anti-social element to it. I went to hang out and play music with my friend, and we had a really good jam actually, quite innovative, but I was feeling a little clumsy in my fingers. I drank some beer and it improved my situation but it also felt less good than usual and I had much more of a hangover this morning (I usually don't get hangovers at all but this morning I was sore and had a little headache). My girl came over at night and was upset about some stuff (not at me, but just about her life) and I felt like I couldn't adequately be there for her because I felt kind of out of sorts, which was a bummer. Then I had a really unsettling dream that left me shaken upon waking up, and I overslept. I feel a little low today which is very unusual for me, but it could because of a few reasons or a combination of reasons.
This experience was certainly more benign feeling than when I snorted it, but I don't think kanna is for me. I was considering trying it again today to see if the reports of better effects on subsequent days are true, but I would prefer not to feel that way today, or really, ever.