So far so good. Even on the lowest setting, I barely have to pedal and this thing is going. It makes it so much easier to bike further. Materials came on time with everything needed. My reasons for knocking a star - the checkout process feels a bit nickel and dimey. So many things are add-ons. Then, after I paid, I got a bill weeks later for my local taxes. Not sure why that wasn't calculated at checkout. I also struggled with install. I wish I could have just paid someone to do it, but my local bike shop wouldn't because they're not certified. I punctured my tire while installing and had to pay to replace it, then apparently installed the pedal sensor backwards so the kit wasn't working at first, and a friend was finally able to help me troubleshoot. I'm now seeing some regular e-bikes for around the same pricing and people are asking me why I didn't just get a regular e-bike. I'm not sure...but too late now.