We were able to put it together without any problems.   You need to make sure that you don't screw in the bolts too tight or you won't be able to get them to lock in with the nuts. (this will make more sense when you get the bookshelf).  It took us about 2 hours to put together.   Really like how it looks but it seems wobbly despite being a very heavy and  solid bookcase.   Hoping with books on it this will improve.