Used this for entire move to another house; perfect timing for getting packed boxes from basement, as my back had gotten more painful as the move trudged slowly on. I know the stair climbing design kept me from more serious aggravation to my back…the energy required to climb stairs with box loads was much less than with a conventional design of two- wheeler. Smooth travel, especially over uneven steps and over thresholds in/out of house & garage. I used it within the weight limit—-no refrigerator—so it performed well. I first installed all four casters, which were very smooth, but eventually removed them; just personal choice. Glad they were included, as I might re-install later. Highly recommend this unit; kept me out of ER & chiropractor office; no kidding. Folds down thin & compact…easy to store