The effect appears to be mild, but it's definitely effective (though you won't notice them unless you stop and think about it for a bit; hence 'subtle'). I recommend only taking it once every 2 or 3 days, or the effect appears to wear off from tolerance. The 0.5gm dosage is about a rounded scoop (not leveled; the scoop might be a bit buried) of the settled powder, and dosing to 1.0gm doesn't seem to be detrimental (but doesn't improve things too much more either). It has a really hard time dissolving in room-temperature water, so if you absolutely want it dissolved, you'll need to heat your water up and mix for a bit prior to cooling (you don't actually /need/ to dissolve it, and doing this also increases how much you'll taste it; being an amine, it really doesn't taste very good, and is very slightly bitter). If you consume a lot of caffeine (even just as a once-off energy drink), it greatly reduces the irritability/comedown if taken about within an hour of the caffeine.

Goes Well With:

Tea, coffee, etc.; anything that's hot and slightly bitter (or strongly flavoured) should help it dissolve and mask the taste well. If you're just mixing it in and not dissolving it, it'll go with just about anything; the powder isn't really noticed on the tongue. Note that when added to fizzy drinks, it will form a slight 'goop' over it, and won't dissolve without heavy stirring that removes the carbonation.