The E-motion's key features remain such as perfectly balanced, parabolic rollers, 3-stage Magnetic resistance & an easily adjustable wheelbase to suit different bikes. Elite has developed the Quick-Motion, using a system of self-centring rockers; the Quick-Motion replicates the floating action of the original E.motion but in a foldable & less expensive design. The Quick-Motion rocker system work best on a smooth, hard floor, if you need to use it on a particularly rough or soft surface it's recommended that you use a trainer mat to help retain the performance of the Quick-Motion system. Compatible with the Elite My E-Training App you are able to see your results & how well your training is going