Schwinn is the originator of the Dual Action Windbike. There have been several companies that either attempt to make something better or something cheaper than the Schwinn models. We like the Lifecore Airbike as it ends up in the middle of Schwinns current models. The Lifecore LS-XT offers features and quality that is better than the Schwinn AD2 but perhaps not as nice as the Schwinn AD6. Over the Schwinn AD2, the Lifecore bike offers more stability, better hardware components, and a computer screen that the user can actually see while exercising.