Once you've assembled the main body of the cabinet, the instructions indicate you have to square the frame using a triangle ruler (not included). It doesn't indicate how you are to ensure the frame is perfectly square, it just tells you to do it. Not having a triangle ruler meant I had no way know if it was perfectly square. However, once I attached the doors I quickly found out it obviously was not. The doors did not line up, and so the handles on the doors were not level. I took the entire apart and put it back to back together 3 times and could not get the handles to line up. One door appears to be slightly warped so that too likely added to the issue. After 4 hours of assembly I decided just to accept it, but for the price, I probably could have gone to a furniture store and purchased a fully assembled product that isn't crooked.