Romeo E.wrote a review of Shimano E-Tube Di2 Wire on February 14, 2014
Familiarity: I've used it several times
i am amazed how robust this wire is and how well it fits neatly inside the frame. i was kind of hesitant about electrical wire on a road bike. but shimano did a great job of building very robust protective shield around the major wires for protection. it is not easy to cut one of these wire's unless you deliberately set out to do just that. Good product and it looks like it will last a long time.