When the 5-star reviews on Amazon are far better written than the book itself, you've got to wonder what publishers are thinking when they green-light a book project. I was excited to find this book and expected a quick, light read. I did actually struggle all the way to the end, interested enough in the outcome to complete the slog.
As noted by many others, the characters are very shallow, but that's perhaps a subjective judgment. More irritating is the continuous repetition of plot elements--which I presume is why others note that the plot develops too slowly. I lost count of how many times this trained "demon Hunter" was surprised by someone walking up on her quietly. 10 times? 20? 30? Over and over and over. An author might be well advised to use a plot tool like this once or twice per novel; it wears out quickly and leads the reader to wish that at least one of the protagonist's children, her husband, her neighbor, demons, or whomever would scuff a shoe or make enough ruckus to at least once give the Hunter a little warning. But no, in this book, every human, every demon, and one supposes even every pet sneaks around like a moccasined Indian stalking deer. Perhaps Kate should consider hearing augmentation if she plans to survive another book.
When the author tires of having various character silently catching Kate in compromising situations--and I promise you that the author does not tire of this easily, she substitutes the fascinating surprise of Kate forgetting an obligation. Although Kate reminds us repeatedly that she "always checks the calendar", the reader is treated again and again to forehead-smacking moments as the Hunter remembers a forgotten promise: playdates, parties, research, you name it, she forgets it. Certainly a demon Hunter might be distracted from more prosaic life commitments, but it is less endearing as a plot element than the author seems to believe.
Add in a one-dimensional plot that takes a back seat to the busy-mom shtick for the vast majority of pages, and a perhaps overgenerous application of parenthetical thoughts (which, sparse at first, appear with startling regularity in the latter portion of the book) so that we are privy to what are (apparently) the Hunter's additional thoughts (supplemental as they are to the already first-person perspective of the book) within her main thoughts (which is a fascinating concept).
In spite of the criticism, I'm rooting for author Julie Kenner. If she can break away from formulaic elements and develop her characters and plot line without the painful repetition (I didn't even mention the repeated scenes with her children and her neighbor, almost any of which could be substituted for any other in the book and leave the reader none the wiser), the premise could bring her a hit series. We need a more serious effort from Ms. Kenner.