The arc trainer is my favorite elliptical in my almost 15 years of working out. I love how comfortable it is to use yet it gives you a great workout. I sweat the most on this elliptical so you know you're burning calories. The pedals are comfortable and glide smoothly whether I go fast or slow. I think the smoothness makes my workout easier because you forget a little that you're working really hard. This is my favorite at the gym! Performance This machine always makes me sweat but is fun to use because of the smooth motion. Comfort I like the smooth glide of the pedals which are big and treaded so my feet don't slip. Ease of Use I like how easy and fast I can program in my desired time, level and program. Durability Very sturdy; always felt safe on it. Design I like the design because I had handles, water bottle holder and little shelf for phone and music player. I like how big the display is and how I can hide or show how much time passed or is left.