I purchased the Sunny Mini Cycle because I have a desk job. It is great because I can do some of my work on the computer and cycle, or if I'm reading something. I have not been able to adjust the tension for some reason (it is a manual knob on the back but it doesn't seem to work well), but the movement is smooth and best of all I can feel it in my legs. I would recommend sitting in a recumbent position when using the cycle to avoid lower back stress. Also, it works best well on carpet, but it comes with a little blue mat to put under it for stability and I haven't tried that yet. Overall, it is a cool little gadget.