Very Pleasant Surprise
I lived in Seattle (as an adult) for 10 years, leaving 22 years ago for Salt Lake City. I never took this tour while I lived there and had very low expectations when my daughter (who still lives in this wonderful city) insisted we take the tour.
It was one of the most entertaining and informative couple of hours I've ever experienced! I learned so much about the city I called home for 10 years and still love more than any other I've visited in the world (well, Istanbul is pretty nice, though, to my taste.)
Our tour guide was very knowledgeable and had a sense of timing and humor that made me ask her if she performed on the stage (she didn't.)
Pike place, the locks, yeah, nice, fun. The underground tour is a whole different thing. Unbelievably cool....take that however you want :-)