This is a bit like a Seventies road movie, say "Vanishing Point", in a post apocalyptic setting, say "Mad Max". It's an entertaining enough story but it's not deep, a bit of SF candyfloss. Not that there's anything wrong with that. But not quite what I was expecting after the only other of Zelazny's SF I have read, Lord of Light.
Short and sweet. Not much more to be said about it really.