While this seems fairly benign, it all gets very intriguing when one of these matches ends up a murder/suicide. What really makes it interesting is that the pair is what the company calls a "supercouple" or two people who came out as perfect 100% matches.
What makes the book so very fascinating for me is the AI. The author really delves into how it is constructed and how it has evolved over time from a simple application to the ultra powerful and intelligent entity it grows into.
Highly recommended.