This is just what I was looking for. It's my first e-bike and I love it. Puts a real smile on my face when the power kicks in and I find I'm using my bike LOADS more. It was a fairly simple installation apart from having to trim down the plastic pedal sensor to fit. I went for the air max battery but I live in a hilly city so it doesn't get anywhere near the maximum mileage.. perhaps 18-20k on level one assist. Support has been good and the packaging and feel of the product is excellent. My only gripe is the remaining power indicators on the battery and the control panel. They're never the same and both appear wildly inaccurate. My battery stopped providing power at the bottom of a hill yesterday even though it had 3 LEDs (40-60%) remaining. Overall a great way to convert an existing bike.