I have been using this machine for over an year and have issues with varying speed. I usually put my walking speed at 3 and can clearly see the speed varying a lot. I dont use any complicated menus, just set the speed and walk but wonder why it goes faster and slower at times. Clearly a defective product. I didnt realize this until the return period has expired.
Good on money but not the best of products. Speed varies when put on a constant speed.