Rode Flossie for my work commute today. New headset and stem!

Headset: didn't even notice it (that's a good thing!) Bike steered like butter.

Stem: Wow! I can use the drops! I almost feel too close to the bars when I'm up on the hoods, but I figure that's a good thing as I really prefer to be in the drops. Was nice to be able to use both, and my back and neck felt very different. No problem steering, so the shorter reach really didn't change the function, just the fit. Very happy with the new stem.