Well puggy you convinced me to part with some hard earned for modafinil.
I am reformed stim indulger (massive speed fiend) hopefully this shit gives me the cognitive function without the destructive elements of amphetamine
Back when Sudafeds were really made of pseudoephedrine (before it became
de faco illegal, in about 2000), I would take a few to help me with motivation and energy to do arduous &/or boring things that I didn't really want to do, like big cleaning-up jobs. It was very good for this sort of thing, and also for staying sharp during really long driving trips.
When I found out about modafinil, I hoped it would do the same sort of job, but it didn't (I gave an experience report on this forum in January).
I know pseudoephedrine is at the very vanilla (and, previously, legal) end of amphetamines, but it is the only kind of amphetamine I have experience with. So, in summary, in my experience, modafinil and amphetamine are very different.
Various things on the internet suggest that modafinil is good for things requiring intellectual effort (writing essays for a deadline, swotting for exams, etc), which (in my experience) pseudoephedrine definately isn't.
I haven't had an occasion to try modafinil when I need to do something intellectual or creative (mu Uni days are long past), but it may be that it is good for this.
Anyway, we all have different metabolism - you may get what you want out of it. Best wishes!