This treadmill is alot more sturdy than I thought it would be. I use it daily and get a surprisingly more exhausting workout than I do on my eliptical. This treadmill is steep which accounts for the workout but I had an old wooden slate from my son's old toddler bed that i place under the treadmill to lift it up just a little in the back. That is the only reason I gave it 4 stars rather than 5. It folds easily and I put it together myself. Couldnt get the wheel cap to stay because 1 of the screw holes were too small for the screw. But that doesnt effect the effectiveness of the treadmill. I suggest you not spend too much time trying to place that wheel cap on like I did. The treadmill works fine without it.