The cart is well designed and sturdy.  It's turned out so good I plan to buy another as a gift for a family member.    If the castors were larger diameter ;they would roll smoothly over carpet. 

Problem:   The hole which accommodates the black plastic sleeve for the castor was drilled too deep.  Consequently when the castor was placed into the black sleeve it  sank too deep.  The cart now travels with only 3 castor wheels touching the floor.  
    

Pros: Although unfinished the surface Is smooth and ready for a fine professional finish.
Cons:  The hole which accommodates the black plastic sleeve for the castor was drilled too deep.  Consequently when the castor was placed into the black sleeve it  sank too deep.  The cart now travels with only 3 castor wheels touching the floor.