I almost didnt buy this item because i read the reviews and a lot of people were complaining about screws not lining up with the pre drilled holes. I did not have this problem at all. I just hand tightened the screws until it was completely assembled and went back to each screw with an impact driver, and the shelf is sturdy as an Ox. My only complaint, and the reason im giving 4 stars instead of 5, two screws were missing and i currently cannot attach one of the smaller horizontal bars. I've reached out to the seller and if i can the 2 screws, 5 stars all day, especially for the price! Update: i was refunded $5 and asked to buy my own screws.