I enjoyed the novella that introduced this series, Christmas Eve at Friday Harbor, and was looking forward to seeing what Lisa Kleypas would do with a full-length book. Unfortunately, I don't think the result is up to Kleypas' normal high standards.
There is a maxim that says that in romance novels there is never a new plot, but a good author will find a way to make a story their own. Kleypas usually does that via evocative writing, specifically, excellent characterization. But in this case, although she has a beautiful setting, the descriptions are somewhat awkward, and although the characters should be interesting (a glassmaker and a vinyard owner), they are somewhat flat. In addition, Lucy's character is inconsistent; she is initially described as wary of all relationships, but she seems to have little trouble trusting Sam and developing a relationship, and the fallout from her breakup with Kevin is so minimized it is non-existent.
The biggest problem that I had with the book was the use of magic. In Christmas Eve at Friday Harbor "magic" is used symbolically to represent the power of a child's imagination, innocence, and trust. It adds to the emotional development of the characters and their relationship. In Rainshadow Road the magic is literal. However it adds nothing to the plot, and at times it seems that it is used in place of character development, rather than to supplement it.
Despite it's flaws, and as long as you aren't expecting one of Kleypas' best works, Rainshadow Road is a decent contemporary romance, and I am going to read the next book in the series.
(On a side note- the cover synopsis for the book, although mostly factually accurate, isn't really true to the story line.)