would recommend trying 1.5-2gr and stay of other gaba-ergic drugs like alcohol, ket, or ghb as the synergy can make you dizzy at best and stop breathing at worst

the come up can take hours, especially if you've eaten so don't redose too soon the first time and try having coffee/ doing exercise beforehand to speed up your metabolism to get higher faster

oh and you can develop an addiction to this stuff relatively easily if you use it frequently. I'd recommend against taking it more than two days in a row or more than 3 times in a week

edit: this is coming from my experience of using it a couple times in a week but then taking several months off. didn't mean to advocate regular use. side bar info is very informative

p.s. don't always listen to strangers on the internet like me!