I have a 2017 Domane SL6 and have been loving it. When I saw the 2020 ones come out, that storage compartment in the down tube made me wish I'd waited a few years! I don't like carrying things on my back, so when I went from a touring bike with rear rack trunk to the Domane with just a saddle bag, I lost the ability to easily carry a decent lock and more food for longer rides.
But I added a small top tube bag for that, just not as cool as stashing the tire repair stuff in the tube!