This sounds ideal. Like pretty much anything, I can testify that in my experience you can develop tolerance and it loses its effectiveness (at least for cognition) when taken daily.
How much of that is placebo? i.e. "You're doing things because you know you're taking something that helps you do things?" Productivity comparisons with a placebo haven't been conducted yet, but I'll bet it will be rather underwhelming as a motivational agent. Especially when you compare it to other stimulants like Coffee, it will sound even less miraculous.
The silver bullet of psychopharmacological brain-enhancement hasn't been found yet. That's the holy grail.
You know how you get "tired", and want to take a break? Still happens.
You know how you get "sleepy" and can't keep your eyes open? That's completely gone. It's a very strange feeling.
How have managed to avoid tolerance ?
I've avoided tolerance by not continuously taking it - if I'm no longer noticing the effects as much, I come off for a while until I really need it again. That seems to have stopped me from building up a lasting tolerance.
And another quick question what is ur schedule? What time do you take it?
I take it whenever I feel like I need a boost of concentration, it usually lasts about 6-8 hours so the latest I'll take it is 6pm if I want to sleep that night.
Also, placebos have side effects.
Not saying it doesn't have effects for some people but it's probably mainly placebo.
Here's a quick primer (with 73 citations): https://examine.com/supplements/modafinil/
It doesn't give the "alertness or kick" of coffee but it gets you in this mood of "do things".
I am a bit worried about the side effects so I haven't ever taken more than thrice a week. Unlike many others who report I don't any changes in mood. Its easy to stretch your days after so you got to be careful not to over burn yourself for the day.
Also I get a really good night sleep after a day of 'killing it' - which may just because of feeling good as a result of getting things done.