It varies per person.

I like it because it doesnt make me feel jittery, its strong, ans cheaper since one dose is all youll need for the whole day.

Health insurance covered cost of getting prescription. 30 pills at costco is only $33 dollars. My caffeine pill i take is about 60 cents per pill and will go through 3 a day on the days i need them.

Caffeine pills, for me, make me jittery. Ive tried a bunch of them and found one that makes me feel the least jittery, but still jittery. Modafinil doesnt make me feel jittery at all.

I work long hours and sometimes need to go on long drives. I can have 3 hours of sleep then go on an 8 hour drive with modafinil and feel completely fine. This is allegedly used by military personnel that need to stay awake AND alert for extended periods of time. Also used often by wall street professionals instead of adderol.

If you do try it, talk to your doctor. Id recommend not taking it more than 2x a week. I only take it once every week or two. Also, get the 200mg. Start off with cutting in half to 100mg dosages for the first few times then take the 200mg for full effect. Price of 30 100mg and 30 200mg is almost identical, maybe a dollar or two higher. When my body was getting accustomed to it, i pooped A LOT lol. Not diarrhea, just a lot.

Bottom line, its a pharmaceutical drug with lots of research, development, and approval by fda. None of which any caffeine pills went through