I first read/bought this book shortly after it came out in '90 or '91 and I still own that original paperback. It's one of my favorite books and I've re-read it over the years. It's clearly meant to have a sequel (which the author has indicated is actually coming, yay!), which is the only real shortcoming with this book (for me).
Re-reading it (it was just released on Kindle, I haven't read it again since I moved to NC) made me happy, because many books that I loved as a kid don't really stand up to adulthood. The SuckFairy and her friends have a tendency to go mucking about in old favorite, but I'm happy to say that did not happen here.
This is the story of a young woman who comes into some peculiar powers and adulthood at about the same time. Calyx is the proverbial black sheep from an aristocratic/power family. While being young, and not particularly suave, she acts afool and gets sent away from her father's "court" to a temple. She desperately wants to learn the ways of the priests, but is treated as they think a pet-daughter-of-a-lord should be (until, of course, she's fetched home for marriage or something). While there, she discovers more about an adversary that has contacted her and learns more about dreams and their powers.
I like the journey she undergoes while learning about herself, her family, politics, her powers, etc. At no point is she entirely on her own, but she's capable of finding the help she needs, herself - not relying on some special person or man. She just needs support, friends (and not romance!, though there is some present in the book - it's not crucial) to progress on her path. I just really enjoy it. She's not perfect, neither is she horribly flawed. She feels very real.
It's not the greatest fantasy ever, but it's very good, and very solid, without falling into many of the foolish traps that fantasy can have. The world building is pretty good, it's a relatively small canvas, so it's not a 1000 page tome describing everything in the world, just what the area we're dealing with is like. Very good, and I so look forward to seeing the rest of the series or at least a sequel.