I got this for Christmas because I have been wanting to exercise more to help with my diabetes but it is way too cold to go outside and walk. This machine allows me to be able to exercise regardless of whether the weather is too hot or too cold to properly exercise outside. I was afraid it would become a waste of money and be used more for a coat rack than anything else but I have been pleasantly surprised. I have gotten quite a bit of use out of it so far and even my kids get on it. It has different settings so you can personalize how you want to train including things like difficulty and incline and it also monitors your vital signs like your heart rate and how many calories you are burning. Knowing the calories I have burned during a work out session helps me to stay on track and ON the machine, because seeing calories burn is a lot more motivation and incentive than just seeing what my heart rate goes to. It is very sturdy I have not had any issues with it, and I love how easily you can move making your body glide which is easier on the body than running could ever hope to be! Performance I absolutely adore how this machine works. It is smooth and easy on the joints and it gets the job done! Comfort Well I am not sure how comfortable a machine designed to make you work out is supposed to be, but I like it well enough. It is easy on the ankles to use it, where I have found that running outside tends to put more stress and tension on your legs and ankles. Ease of Use It comes with a huge manual and it confused me at first, but once you get the hang of it, its not hard to use at all. Durability so far so good Design I love the way it looks and how the design allows such fluidity of movements I just wish it had some sort of screen where you could look at different landscapes while you walk or run so you can pretend your outdoors.