I just finished reading the book by Bret Easton Ellis.
Quite possibly the worst book I've ever read.
I understand what Ellis is trying to do, but it is a very difficult read. The characters are two dimensional and Ellis provides little narrative to help the reader.
I can read a book with loose narrative as long as the characters are interesting. Fear and Loathing in Las Vegas is a good example.
I can also enjoy a book with two dimensional characters if there is a strong narrative through line. The Fountainhead would be an example.

Ellis provides glimpses of a yuppie world that never really existed in order tear it apart. The transgressive nature of the book is dulled by the lack of any glimpse of normal society. The repetitive nature makes you feel as though you are reading the same two pages over and over again. I think it could have been brilliant as a short story.

In short: If you want a transgressive look at yuppies and consumerism that you can enjoy, read Fight Club.