have you tried a pre-workout style dose (it’s about 8-10 coffees in one)? The first time should give you a pretty good idea of what the “jittery” feeling is.
I googled some pre-workout and it seems to be about 200mg of caffeine, same as a can of Monster. I've drank 2 cans of Monster back-to-back a few times in my life and still not felt jittery.
I largely share experience with Kiro, I don't feel like caffeine makes me perk up at all really. I just drink Monster cause I love the flavor of some of them.
