This would have been a great cabinet if Part B (the right side piece) had been drilled correctly. The drill holes are off about 1/3".  I was able to force it together and it's sitting in my carport so the fact the doors don't properly shut and the back is unevenly nailed isn't critical, but before you cut up the shipping box, take a look at Part B and make sure the holes for attaching to the top are correctly placed.