Yes, its daily. It took a few days to notice a difference for me, but it definitely helps me with executive function. I’m up to the max dosage after 18 months, but it’s still working.
Side effects for me are nausea for maybe an hour after I take it, and major “shrinkage”. Sex is a real challenge for around 8h after taking it, and it looks like I’ve been swimming in the Arctic sea for about that long. This isn’t a major problem because I take it in the morning, but it has been occasionally frustrating. That effect wears off by evening, though, so my spouse is ok with me taking it. 🙂
I have never taken stimulants, so I can’t offer a comparison there.