I have used my Swytch-kit for over 600 miles and, in general, I am very satisfied with my investment. There have been issues but they have mostly been the implementation of the kit and the setup of my bike. All but one issue was resolved with minor modification. I have yet to figure out how to use the additional throttle switch because of interference from shifter and brake collar on the handle. The motor has been as smooth and powerful as advertised. The (50-mile) battery has not quite reached that potential though I get satisfactory results of up thirty miles while still maintaining a significant level of power. The crew that put this together fumbled a few things initially, especially communication but they dealt with a number of hurdles that might have crashed a less motivated group. They get a lot of credit for their perseverance and the quality of the final product.