We have bought 3 of these shelves for our garage.  They are really easy to put together with my husband and I.  We needed 2 of us to slide the shelves down where we wanted them.  We used a leveler to make sure the shelf was level before moving on and that seemed to help us a lot.  I think we put the 3 of them together in about 30-45 minutes each shelf and that was doing that while fighting 3 puppies who wanted to play.