That review,here, is worth reading for anyone watching or interesting in watching the Amazon Prime series.
Anyone interested in works based on the novels of Dick should focus on this key quote (I added the emphasis):
Pop culture has exalted many of Dick’s wilder stories and novels. Since the release of Blade Runner (1982, based on the short novel Do Androids Dream of Electric Sheep?) and Total Recall (1990, based on the story “We Can Remember It for You Wholesale”), his pet motifs of false realities and artificial identities have captivated filmmakers. …Along the way to becoming popcorn entertainments, Dick’s motifs have shed a lot of their existential baggage. Today, the revelation that capsizes everything a movie character once believed about himself and his world is just another mind-blowing plot twist. No sooner have we gasped Whoa! than the film has moved on to the next chase scene, martial-arts display, or explosion. Nobody sits around questioning their own reality or humanity the way Dick’s protagonists do. Those questions, however, were the whole point of Dick’s fiction
That’s a great critique of even the better works based on Dick, like Blade Runner. Whenever you see or plan to see a film or TV series based on one of his works, it’s better if you can read the novel first. Doing so will add much more complexity and richness to whatever you are about to see.