Instructions are well done, but you really have to pay attention and assume nothing. For example, when assembling the trusses, the nuts and bolts are shown the way they should be done, but it's easier to put the nut on the other side from where it's shown. Seems like it does not matter, but you find out that it does later on.  Also, they tell you about sliding the walls into the slots, but you better be really sure you use your rubber hammer to get them all the way in those slots or you will pay the price when you get to the corner pieces. The corner pieces are a real "joy" to get in as well and I don't have any tips for improving that frustrating step. The "skylites" will sweat and drip on your stored items. I'd rather not have them.  I'd have given 5 stars if they added more tips to the instructions so I wouldn't have made the few mistakes I made. Product is otherwise great so far - 2 months in place as of this writing 12/18/2020.