Pro - This bookcase looks very sharp and exactly as pictured. It was extremely easy to assemble and fulfilled our needs! The boards are heavy and seem to be pretty strong.  We put a lot of weight on it and it is holding well.
Con- Must be anchored to the wall for stability otherwise it will sway (not stay square in its shape).  The backing that came with it was very flimsy (like cardboard) and looked damaged so we didn't use it. Perhaps if we had used the backing it may have had more support in the frame. We anchored it to the wall so it wouldn't move and to keep it stable. The anchors that came with it were small so I ordered larger ones that worked nicely. 

Overall we are very pleased with the look, style and how easy it was to assemble. I would have given it 5 stars if it had came with a stronger backing but nothing anchoring it to the wall couldn't fix.