I bought my 200W conversion kit back in Feb 2011 and have now ridden over 21,000 km on it. The water-bottle-style battery and the motor are both still going strong. I travel 250km a week to and from work, I pedal hard and only use the motor to go up tough inclines. The Solar Bike stuff is great, but the Trek FX7 it was fitted to is now dead. At 16,000 km all the drivetrain had to be replaced due to the heavy usage, costing $300. The original rear wheel popped about 15 spokes, even though the battery was on the frame and the motor in the front wheel. Now the actual frame where the rear wheel is clamped in has snapped off. None of this is covered by warranty even though it has a lifetime warranty on the frame. How is that for reliability of the Solar Bike kit? It outlasted the brand new bike, complete with a ‘lifetime warranty’ – amazing stuff!