Cheap materials and poor instructions. Holes youre supposed to screw through andor connect dont completely line up, which makes assembly quite difficult. And pieces that need a specific arrangement are not noted in the instructions unless you pay super close attention to the tiny pictures, if at all. How part 4 and part 11 go together is not well rendered, which left me unsure Id done it correctly. The lack of obvious detail caused me to put part 3 on upside-down in step 10, which only became apparent at step 12, at which point not only was undoing steps 10 and 11 extremely difficult, but part 3 actually broke in the process (because cheap materials.) For the instructions and assembly alone, I would not buy this again.