Yesterday I received the great packaged items Iron-Power Force Two. Many thanks to Amazon! Again and again, there are complaints in existing recessions over the smoothness that unfortunately nothing with a quality fault but simply and solely to do with it has, that the corresponding Rezensoren have obviously failed to understand the physical background of a gyroscope. This thing can be started (for an experienced) without difficulty without the two supplied Start Schüre. Unfortunately, to get as "unskilled" very quickly reaches its performance limits. That is, the gyro can generate greater forces than you can hold yourself. Uneven running occurs only when the gyro "does not know" how to react in other words, if the user is not in conformity with the device. If you have managed to respond to the device it with his muscle movements, it is easy to bring the Iron-Power momentum and to train it! The gyroscope reacts immediately with a gentle noise on a change of direction and sets this also equal in a speed increase of up to loving the mighty forces are no longer "under control" has. So far, unfortunately, I only knew the Plasikversion, which bears no comparison with the Iron-Power! (-and Even more recently use was scrap!) Unfortunately, the price of a mass product like this is extremely high. But quality has probably your price! Empehlung: Even though I have made the leap from a plastic part (about 10 years ago) in this high-tech device I can only say: Beginners should start with the Iron-Power V1 to be not overwhelmed from the start! Retrofitting can you then still !! A big advantage is the ability to be able to unscrew the housing apart to clean the appliance. Also spare parts are available! This review is not meant to be an advertisement for the product! - I for one am excited and I look forward this opinion to share!