I've been using I-Doser, almost daily, for a few years now and have amassed quite a large collection of doses. I've tried almost every stimulant dose on here, as I use I-Doser to help give me a boost of energy and focus whilst programming or programming or working out. While the Adderall and Dopamine doses work very well, most of the time. SpeedQH has remained my go to dose because it's always consistent and effective. Moreover, it being only 10 minutes long makes it very convenient as I can quickly play the dose and face the work that lies ahead. Highly recommend.