My Treamill is the cross walk 415 and I have had it for 4 months and love it, It has 6 different workouts on it and inclines own it's own as you are doing your walking  or running on it. I walk on my tradmill 3 to 4 times a week for about 40 minutes. It has a saftey string on it that attachs to you so that if you fall off of the treadmill the machine stops . I like most of all is the built in diffrent workouts I watch TV and pick a workout and before I know it I am done !