Really like the final product even though it's not totally put together.  What do I mean?  (1) Holes didn't line up.  In one case, it was important enough for me to drill the hole to a larger size so the bolt could get through.  (2) The shelves had pre-drilled holes but they did not line up. I put the screws in at an angle, BUT the construction did not allow me to put in all the screws. Had they been twice as long, I might have made them work.
But since the shelves sit in the supports, they will be okay. Maybe I'll reattack with longer screws later.