A magnificent understatement.
It could do with extensive editing. Here's my main problem with Rand - She drops off the main plot of her writing for extended and unnecessary authorial intrusions which exist solely for the purpose of expounding on her own political viewpoints. Not only that, she didn't even understand how her tracts affect the material nor her readers. She claimed in an interview that her beliefs were not based on any existing philosophical standpoints, yet she explicitly goes out of her way to link her works to contemporaneous movements which exhibit all the traits of Objectivism in varying degrees. The authors who took up her work and transformed it into the thing Objectivism became - which isn't entirely what she had in mind, remember - have had more effect on her standing that casual readers.
Actually, there are a lot of people who just don't give a damn. Once you've read the same argument rephrased a dozen times, it gets tired and predictable. It isn't that I hate her writing, it's that - by the time I had read through the books - I was tired of hearing the same things time and time again. There may or may not be a point to the viewpoints she espouses, though the way she presents the material is incomplete without a strong reason to accept - without hesitation - what the characters say. They are mouthpieces for her in the form she uses, and that (when compared to the way certain other philosophy-heavy writers use metaphor to get across their views) is increasingly obvious the more you read.
I may be in the minority on how boring I find the characters and plots, but I've read a lot of the material written in response to her as well as her novels. YMMV on the lasting impact of her work, but as an author - someone whose work entertains and / or educates - she is severely lacking.