I know the book won the Hugo but I couldn't get through it. I didn't find it dense but I did find it uninteresting. I haven't seen the series.
I didn't think that I would like the series either. The topic doesn't really interest me, and in general I haven't liked the Phillip K. Dick stories that I've read (I have not read the book the series is based on). So, I only started watching the series about a month ago, when I decided to watch the first episode on a whim, while doing something else. It drew me in so much with the story telling that when I got home that night I watched it again with my spouse, and we've both been catching up on the series since then. We're currently about halfway through the third season.
A word of warning if you're looking for an immediate SF theme, though: the first season is mostly a spy thriller set in an alternate universe, with the setting being the only thing that's really "SF" about it. But that changes in the second season, as the notion of parallel worlds becomes more central to the plot. By the third season that concept seems to be driving the plot. So the "SF-ness" starts slow but builds as the series goes on. I'm very interested to see how they finish it up in the fourth season.
