I have them on my Vespa 250GTS.
They are the BEST tires I have put on them, going through a set of Michelin Sports and City's and a set of Conti's.
No headwobble, does not excessively track on textured roadways.
That said, the Dunlop Aero's I have on the CB550 right now impress me.
If I can get the Heidenau's, I probably will because of how authentic they look and I know the rubber is good.
If not, I will go with the Dunlops.