I used the kit throughout the entire summer of 2023. I'm quite pleased with the product. The battery provided me with the energy to ride faster with less effort. Generally, I select level 1 on flat surfaces and level 2 when there is wind or a slight incline. For me, levels 3 and beyond are just a waste of energy. At level 1, I can bike 45 miles (70 km), but the range drops to 18 miles (30 km), and when cycling uphill, more energy is required, significantly impacting the rest of your ride. If you plan to ride long distances, you will need two batteries, but it can get expensive. Dealing with customer service during COVID-19 was challenging. Fortunately, someone took charge, and I eventually received the delivery after almost a year. I didn't receive the proper wheel size, but once I installed it and went for a ride, I felt almost no difference. Just contemplating the idea of returning the wheel and getting the correct one was enough to elevate my anxiety to the roof! The product is fairly good, but take the time to shop around. The packaging was sufficient, and the booklet is quite comprehensive. However, their advertising suggests that you can easily switch the kit between bikes. Forget about it. You have to reinstall everything on the other bike—cables, wheel, and adjustments, etc. The max battery is quite heavy, if you insert it in your backpack. One thing I love about the product is that you can remove the battery, lock your bike, and go shopping. It's easy to remove and easy to install.