I bought this not only because it was wider than others but also because, based on other reviewers comments, it seemed sturdier.  And indeed it is!  I have it leaning against the wall and it's solid and not going anywhere.  I am going to attach it but only because I have toddler grandsons one of whom is a climber.  It fits the nook I purchased it for perfectly based on the measurements provided.  Very pleased with the purchase.