I have a friend that is on provigil. She loves it. It helps her tons. My neuro offered it to me but the adderall is working so I turned it down. The provigil is new and isn't in a generic form. It can cost upwards of $800 a month. I have good insurance but one of my other meds is $2,800 a month. I don't need to anger the insurance gods with another pricey med.
Provigil is not without side effects. It can be hard on your liver. It can cause a serious condition called Stevens-Johnson Syndrome. It has also been associated with some psychological issues (mania, anxiety, depression). It seems to affect dopamine levels in the brain.
It is like most drugs. It all depends upon your body chemistry. I hope it works for you.