I bought 2 of these for my basement office and they are exactly what I was looking for.    The first didn't come with instructions, but they were easy enough to find online.  Be mindful of the direction everything is facing.. I made the mistake of installing a small bottom panel in the wrong direction.  It wasn't too difficult to fix, but at one point thought I would have to saw it out and ruin the bookcase.  Nevertheless, it all worked out and looks great.  I would give this 4.5 if I could.

Pros: Very easy to assemble.  Especially the 2nd one.. I did the second in about 15-20 minutes.  The first took me an hour.
Cons: The only negative is that there were a few imperfections on the wood in one of my bookcases.  Not enough to warrant a return but noticeable as I put it together.