Overall a nice bookshelf. It definitely took longer than the estimated 20 minutes to put together with two people. My husband and I have put together quite a few pieces of furniture in our lifetime and it took us about 2 hours total  to build this.  The reason being the top part of the shelf had a natural slant when all of the holes were aligned...so we had to take apart and rebuild a few times to make it work. The holes weren't exactly correctly aligned. It wasn't anything we couldn't manage though, just took longer than expected.