Only a handful of times from the sample pack I bought. There’s not a lot of adrafinil in it but it doesn’t feel like they were trying to go for that full heads on keep you going through the night feel. I think they added it in to just give you that bit of pep to synergize with the rest of the other ingredients.
With modafinil/adrafinil, I would half dose them at first (100 mg’s for modafinil, 150 mg’s for adrafinil) to see how you respond to it. Stuff is not like meth though, so please keep expectations reasonable

It helps clear mental fog as well as just generally allow you to function well with the task at hand and also be able to go for quite awhile. I would be cautious with use, I know that when I first played around with it, I took it like every day without breaks for a short while, stuff kind of build up for me and I had some insomnia. YMMV.