I searched for a long time to decide which company to build my commuter bike. I went with Ali and Ebikebc because of the reviews and his support. Well I was not disappointed. Ali walked me through the issues that a first time conversion e biker would have. He called me, emailed me and recommended what to purchase. Even when I busted the PAS he sent me one free of charge. My bike is perfect for commuting 30km a day. Could not be happier. I purchased the D35 conversion kit, 350W system, with the battery upgrade.