I wish I had read more comments online before spending $674 on a Kirkus review. I naively assumed that for that amount of money I would receive a discerning analysis that at worst would yield a quotation or two that could be used to market the book. That's not what happened. Like others, I received a vacuous summary that read more like a book report written by a lazy high school student--who sprinkled in a few quotations to demonstrate they had "read" the book--than a professional review. While the "review" was not negative, there was no critical engagement and not one sentence worth quoting or one positive comment about a book that has been praised elsewhere. The only hint at criticism was a peevish complaint that the book is too long and there are too many deaths--six over a period of fifty years.
In my experience it is evident that Kirkus does not offer a service commensurate with the cost of a review and that it takes advantage of the good faith of people who have put a lot of time and effort into their work. A brief examination of comments online supports the perception that the reviewers are unqualified, even apathetic, readers looking to pick up a little extra income who are not governed by uniform standards or professional oversight.
You may have written a very good book, but don't believe the reviewers at Kirkus will make the effort to read your work carefully or write a few words to acknowledge that.