I prefer to downshift. If left in S-mode the car only downshifts at the vary last second rendering no benefit of the downshift probably why it is smoother. My opinion it is more of a safety feature then a downshift. If the downshifts are done around 3,000 rpm or less then it should be pretty smooth and still provide a braking benefit and smooth power if you need to accelerate all of the sudden. Seems never to be at the correct RPM unless I am shifting it. After all it is a MANUAL transmission. I found it to be smoothest when not using any of the automatic features and just manually doing everything. Just my .02 opinion.Just wanted you guy's opinion on downshifting when you come to a traffic light in manual mode. I found that just letting the intelligent transmission downshift for me is smoother than when I do it.