James Griffinwrote a review of Cervelo S3 Disc Ultegra Di2 R8070 Complete Bike on June 20, 2019
Familiarity: I've used it once or twice and have initial impressions
If you are in the market for a stiff aero race steed you owe it to yourself to checkout Cervelo's S3 disc. The fully internal wiring setup of the Shimano Di2 R8070 drivetrain gives this bike a super clean cockpit free of wires and housing. Impressive stopping power gives you confidence heading into the turns as well as helping you avoid that careless driver (which I discovered firsthand on my first ride).
Your can really put some power through this bike. It accelerates on command and handles better than I would have expected. Descending the steep canyons here in Utah is a breeze and you can hold your line in cross winds without too much trouble.
Sizing for Cervelo is based on Stack and Reach which makes it easy to get you on the right frame size. The 56 fit me perfectly at 6' and a 32" inseam.