I gave this unit (and all the others I ordered) a 4 star only because in the end we made it work and I was pleased with the results. BUT…pieces were missing, wrong panels were included, instructions were detailed but confusing (thankfully we have experience in carpentry) and we ended up with extra random parts. I couldn’t contact the company for correction because we bought it too long ago. The quality was great so no problem there. 
My advice is to open and construct right away so if the packaging is wrong, you can get help