Originally was reviewing under desk bicycles. Then started to compare with elliptical. There were a a few points that made a difference for me. First, feet side forward and backward rather than up and down thus minimizing knee stress. The under desk elliptical has a large flat surface rather than a loop for foot which to me is a problem. Also, this unit is super quiet!! It is heavier but does not move on tile floor which a big plus. Yes, it is a challenge to remove from box but that is because it it securely fastened to stabilize it in the box. It takes a couple additional minutes to remove but well worth the effort. I am petite and use a pillow behind my back so it is super comfortable. This a great companion to my magnetic rower for my exercise routine. I feel so much better using it almost daily. The only negative I have is it would be great if there was a higher level for more of a challenge.