Jim Merithew of WIRED Magazine reviews and has a blast on the Domane 6.9.
when we hit our first section of cobbles every single journalist on the ride had the same reaction—this thing really works! I could hit the cobbles at full speed without being thrown to and fro, allowing me to keep the pressure on the pedals without the hits affecting my pedal stroke.
IsoSpeed isolates you so completely from the pavement that in most situations you barely feel anything at all through the saddle.
...the Trek Domane and its ISO Speed technology have taken a truly inspired design and leveraged Trek’s amazing pro athlete feedback to deliver an incredibly effective compliance solution that takes nothing away from the bike’s ability to drop the hammer.
You don’t need to have Fabian’s motor to make the most of this bike, but if you do, it’s more than up to the task. You want to ride longer, more comfortably, but you want to do it faster than ever before. You don’t like sacrifices in your bike’s performance, but are happy to sacrifice by taking a long pull in the wind.
We tore through potholed country lanes in astonishing comfort. The feeling of being isolated from shocks with no adverse effect on pedalling action or steering deflection was uncanny, and the Domane was as fast uphill or on the flat as any superbike we’ve ridden.