The first unit I ordered was a little difficult to assemble due to the base holes not lining up on Part B.  Shipped it back which went pretty flawless.   Received the new unit in no time at all.  Second unit assembly went very well.  Finished assembled product looks great and accomodates my 65 inch TV very smartly.   The only issue I had was the two block supports labled " K " that help support the base.  The unit required a little leveling adjustment on all 4 legs as a result of these support blocks being slightly different in height from the bottom to the floor.   Great product and complements the room nicely.