Is it up-to-date on quantum mechanics? No. Is it entirely accurate? No.
Does it approach the subject matter in a way that was popular in the 1970's new age circles? Yes, (not surprisingly given its genesis in Esalen's communal dining hall.)

But it is also a fun, engaging introduction to physics and quantum mechanics that is accurate in many broad strokes, and Zukav's style shows his excitement about the subject and the parallels he drew to eastern philosophy.

I'm re-reading it for the first time in twenty or so years, and forgot what a fun ride through the history of physics and quantum theory that Zukav had charted.