Far too long to wait for it to arrive, ordered in Feb, arrived end of June (nearly 4 months), Peddle sensor fitted fine but not the magnetic part to the peddle arm, eventually fitted with use of glue and sharp knife. Ordered the thumb throttle but this dosnt seem to do anything when riding the bike. wheel goes round VERY slowly when lifted off the ground, but i expected it to propell the bike when not peddling, but this dosnt happen. waste of money on that piece ! Overall it works well when peddling, up hill is fine, without strain on my legs. Fitted to a hybid mountain bike that i have had for years, fitting was easy enough, just some patience ! Price ok, but cheaper rear wheel options available out there..