I purchased two and loved the bookshelves, but had 5 more boxes of books I wanted to display so bought the third. These worked perfect for my collection, lots of varying sizes. The first one took about three hours to put together, made a critical mistake about half way through and had to undo all that work. The last two took about 90 minutes, now I could assemble these blindfolded. 

The shelves are sturdy, they are well packaged, and I think they look awesome. I'm out of shelf space, but if I keep acquiring more books I'd get a fourth.