Quality control needs improvement.Several alignments of nails and holes are off. One of the weight baring boards the predrilled holes are too large not for the screws that supposed to fit with. 

We asked the seller to replace that board only, didnt ask for refund or replacement of whole tree. The customer service ask us to upload the pics and instructions to another website(not wayfair,not the seller website). We endup use wood filler to solve that problem, to avoid weeks of potential back and force confirmation with pieces blocking the entry.