I won't answer in the poll because really my reason was severe cognitive problems relating to protracted benzodiazepine withdrawal syndrome, although I would consider myself quite normal as of the last few years I can't exclude it mostly being down to becoming better from that particular condition, and I can't recall my baseline before this particular concern came to be. But yes sure I think it has plenty of potential as a "smart drug", and it appears somewhat unique to me in that it has some obvious long-term effects albeit those might not be the most obvious or flashy.
I saw prophets posts about his concerns, and while I can't speak of that in particular (except I do imagine the "flu like symptoms" listed in the leaflet and experienced temporarily by myself and some other person certainly does seem like an immune reaction) I can say that after having used maybe 1000 ml since 2013/2014 there are some long-terms effects and while most of it has been positive one somewhat negative effect is that I appear more sensitive to things like nicotine, racetams, caffeine, methylphenidate. Although that is in part positive as well, but it makes it hard when I cycled this stuff to figure out a good dosage for those other substances in between (on the rare occasion I did), sensitivity kept changing. It increased the effects of these substances the most right after having done a cycle or on the rare occasion I combined it, and the longer time passes the less increased effect of these substances.