I have some of the "Super Indo" kratom. I smoked it with some bud the other night, and felt slightly different, kinda like a slight opiate buzz. I'll try smoking a straight bowl of kratom soon, we'll see how that goes.
Smoking kratom is very ineffective. It's meant to be ingested either in a tea, or straight up leaf. I highly doubt you felt anything more than placebo.
I must have smoked .5g and ingested 2g. I know I felt a head-change from the kratom...when I smoked it. Whenever I take new substances I try to feel 100% sober, but after I smoked the kratom I definitely felt a different sensation than I what I normally feel when I smoke only cannabis.