The concept and features of this cart are well thought out. However in execution the function of the cart comes up lacking. Overall it is light weight, has a light weight feel to it and consequently, limits you to light weight loads. In reality you would be better suited to finding a card with larger wheels that would also go up stairs as you still have to pull the cart up each stair. While going up stairs with this cart and a heavier load, I was in constant fear the load would shift and fall over. Perhaps limited to light loads the cart would rate 4 stars.