I just love my Swytch bike! I bought it because I have heart and lung problems and haven't been able to ride a bike for years. The install was a wee bit challenging because of the pedal assist disc, but I was able to figure it out on the second try. For my pedal type, I was supposed to attach the arm to the pedal stem; however I removed the teeth on the extra disk and that worked perfectly without the arm. I installed the kit on a 24 inch adult trike and couldn't be happier. If you are in the USA, expect delays on delivery, but it will be well worth the wait. I highly recommend this for anyone who needs a wee bit of help.