It's not The Demolished Man, it's no The Stars My Destination, but it's certainly Bester. I don't have any prior Zelazny experience to help determine what was his and what was Bester's, but there are noticeable style and pacing changes throughout the book. But don't let that stop you. Any Bester fan will find plenty to keep things interesting, and I personally find Psychoshop much closer to his first novels than his later works (Golem 100, The Computer Connection, etc.) which most readers tend to find inferior. Oh, and as an added bonus, keep your eyes open for the Burning Man ...