Super stress free operation, thanks to Di2 technology. Digital operation reduces the chance of human error and continuous durability. Ergonomic controllability with Di2 technology for next generation of riding experience. Optimum ergonomics contributes to better steering control while the auto trim system makes it even more easy to ride.
These were my first foray into electronic shifting. They are great. Very comfortable for my long rides. If you're considering electronic shifting, save your money and go Ultegra, not Dura Ace, sure, the DA is lighter, but it's just not worth the difference.