The current based cadence sensor was a nice thing I liked about the 700 Series. I really liked the fact that you can change the current output for each assist level. I love when companies give you flexibility like this, to alter different aspects of a device. This was before I even knew I could change the controller and display to a KT set up. Needed just a bit more torque to assist on the hills in my area. I just kind of wish I had waited to buy the bike as 6 months after I bought the bike, there was a new battery size that uses 21700 cells, instead of 18650s. Still a great bike.