Two weeks ago I installed the BionX 350 on a Trek Verve 4. Wow, what a combination. I ride down the road with a big grin on my face. The BionX system is well engineered. The torque control peddle assist keeps me working all the time. The only difference is that at higher assist levels I can go a lot faster for the same effort. If I want to take it easy, I can just use the throttle. System is dead silent and the display module provides good information on the state of the battery charge remaining. I highly recommend this system.