I run 4 miles per day, and since receiving my Elliptical ProForm 1000 I have mixed my workout up a bit. I use the Elliptical every morning and burn 500 calories, then get on the ProForm Treadmill. This machine is sturdy, comfortable, and an absolute challenge even for the expert workout person. I assembled the machine in 2 hours, directions "ok", just time consuming. Overall, the ratings I reviewed about this machine are right on the money,,,,,best Elliptical for the money and it is.