The Sole e35 elliptical machine has one of the largest sized flywheels of any consumer level elliptical trainer. They weigh a ton, which has a number of advantages. Chief among those would be the smooth performance which it provides. A lot of more affordable alternatives tend to have difficulties when put through their paces with more intensive workouts.
http://bit.ly/1CXFqHr
https://vimeo.com/134518063
