I used to think that "noted" meant just that. But from this question's replies, it seems that that is (mainly) used with a negative connotation. So how would I point out to someone that I took what they said seriously (preferably with a connotation of gratefulness for the information)?
Also, in cases where it is spoken, the tone of my voice might help clarify my meaning, but when it's written it's even more complicated.