It's not mellowing out much. It's not the coffee though, there were some fundamental problems with the brew. It finished way too high at around 1.021 so it is cloyingly sweet. There is an acrid flavor in there, too. I did get a chance to speak with somebody from Kona and they said they use a press to extract the coffee flavor, but the guy I talked to wasn't sure if they use cold or hot water to steep the coffee.