I've used it off and on for years to enhance my work capacity. I work in engineering and it helps me focus on complex problems. It's not bad if you take it in moderate doses and i never take it more than 3 days in a row. It has a 15 hour half-life or something in that range. You will have plenty of energy and be focused on everything. The only problem i have with it is that it increases anxiety just like any other stimulant.
It's not like adderall, it's more mild and not very toxic when used correctly. It will cause sleeping issues for sure. On the days i take it, i take it at 6am so it wears off by the time I'm ready for bed. It's also great for athletic performance, you will get great workouts on the days you take it with tons of energy. I don't drink any coffee the days i use it.
I never remember feeling dependent on it, but you will get burnt out on it if you take too much for too long. You will start to get headaches after a few days. The longest i took it was for about two weeks at a low dose, after 2 weeks my brain was worn out and i constantly felt fatigued. After a few days off from it i felt fine.
I don't normally recommend drugs to people, but this one can really help you work/study long hours without a problem. It won't show up in a drug test, but it's considered a PED by the IOC. It will definitely give you an edge mentally and physically. Sometimes I'll use it when i go pheasant hunting up north, it makes your reaction time and coordination quicker IME.
I've never heard of anyone having problems with it other than anxiety and not being able to sleep. The last time i used it was last year to get through some 16 hour work days. I might use it 20 times a year, if that.
