This is a great idea and to a degree it works. I have a new hybrid cycle and attached the unit as directed and in the instructions it warns it may be in the way of your feet. Well it does get in the way so you have to cycle using your arch and not the ball of your foot.This is a very poor design and could so easily be sorted by the manufacturer. I only have size 9 shoes so not really large. The lead is adequate but could do with being slightly longer.