Yes they do, immediate feedback, I have around 7 of them installed. I even wrote an app available in HACS to provide smooth dimming functionality when long pressing the dim up/down button and stop dimming when you release it, call services with button etc… In case you are interested you can find more info here: DeCONZ Hue Dimmer Switch app with smooth dimming functionality
Also let me know in case you need help setting things up.