You buy a valence and heavy equipment that runs quietly, but on a step shell constantly squeaks when it is not exactly straight. Can confirm a Mitbewerter, detach themselves and oils helps nix The unit has about nine months in use and is used almost daily by two persons. We have from the beginning of the adapter is always a low whistle given by itself, does not necessarily speak according to my husband for the quality. After the coach give the plug from the socket without power there was no whistle. The adapter was then more recently, from one day to break tomorrow. In the evening, even trained, the next day he could not continue. Amazon and MaxTrader have resolved the problem with me quickly by email. Within a week, a new adapter was delivered. However, the same problem again, energized there's now a humming. My husband now has worried an adapter in the specialized trade and the problem is solved. I would like to give three and a half stars, what just not going. The device is quite ok, but can not compete with the devices that I looked in stores locally, but also offer the 400 to 600 cost more but for. T. for more comfort. Those who intend to frequently use a cross trainer in the long term and, if necessary, should go in and yet invest in a somewhat more sophisticated model.