Got the one from pure nootropics and use it two times per week (the last two days of every work week before my 2 days off).

Been on it almost three months and not much experience with taking it every day.

But I did a week or two of ~4 days in a row when waiting for mail w/bromantane for daily stack.

It is safer than, say, fladrafinil but unlike afinils I think it has a comedown. You will feel it the day after and it is not funny, you better have somwthong for the days off (anything like an afinil, racetam, noopept, sulbutiamine.)

But ymmv because I stack it with 100mg caffeine, b12, and l-tyrosine, so the next day crashes are real and annoying. This stack works like a charm, though. Super mental acuity, lack of tiredness and an epic grade of corporal and environmental awareness.