Tritime Magazine has been testing the new 2018 HADRON Ultimate 625 aero wheels for a few weeks. Read what their editors had to say: https://www.tritime-magazin.de/2018/02/swiss-side-laufraeder-hadron-ultimate-und-classic/
"The first few hundreds kilometers felt already very promising. There is no weakness at all regarding the stiffness of the wheels. Despite the cold and wet weather, we did not notice any deficits in braking performance. A more detailed test report will follow shortly.”