Compared to the extremely old treadmill I use to have this one was a life saver. It was nice to have a treadmill that was more quiet and folded up when not in use. Plus it keeps track of calories burned, your mileage, and how long your work out is. Performance It works great. The speed gets pretty fast and the settings are all pretty accurate. It goes up to ten miles an hour which is really fast compared to walking. I usually have mine set at 4.0-4.5 depending on whether I am speed walking or running. Comfort I think its very comfortable. There's a handle bar in front and on the sides if you do need to hold on while running or walking. There's also a cup holder for water and another holder for an ipod or cell phone. Ease of Use It was a little difficult t figure out at first as far as the speed, mileage and time clock. You have to hit the mode button to set everything or you can just set the speed and it will keep track of the mileage, time, calories burned, and pulse. It was very easy after I figured it all out. Durability It has held up very well. Design I love the design because you can fold it up when not in use. It is in the basement and on the outer border of my kid's play area so it is not in the way anyway but it is still nice to be able to fold it up to make the basement seem bigger than it is.