Horses for courses. I test drove an Aventon Level, a really decent hub drive cadence sensor. I liked it....until I drove a mid-drive Bosch. A torque sensor feels much more organic and connected compared to a cadence sensor. That can be good or bad, depending on your style and needs. A cadence sensor rear hub system will be cheaper and gives you easier boost. From my perspective, cadence sensors are just as good at getting around, but if you want to work a little bit more, a torque sensor will probably get you into shape more quickly, and feels a lot more integrated.