The Christopeit rowing machine Cambridge II seems at first glance, once it's assembled, not as robust in material, as I had imagined. But for the price you can not expect. The training with this device, however, is okay, which I have chosen from the outset the level 4, because my 3 first levels are too easy. It brings quite a bit, if you repeatedly trained a week with it, because the whole body is involved. Not only the arms and shoulders, and stomach and legs. And for the back it is supposed to be good. For a well-trained people, the device is only partially suitable for an average consumer like me, however, already. I prefer to not build muscles, but I press just a little sporty. And for that, the device is ideally suited. Small drawback: The computer does not work with me. But is not dramatic, because I train on time. Nevertheless shame.