This took about 8 hours to assemble in total. My advice is to look through all the steps prior to starting and pay attention to hole count. This ensures your pieces are facing the right directions. Additionally when putting a siding piece on start with the center screw and move out on each side. This prevents misalignments of remaining holes as others have mentioned. Lastly, I peeled the plastic away from the holes and once assembled I pulled off the plastic wrap. This helped me save time - pull down and evenly from both sides. I made a floor/platform using old scrap wood. Overall for the price, it was worth it and I recommend. Sturdy and good looking. Fits all my gardening tools I use most frequently.