This is a sucker's book. A great summary of a problem with no way to solve the problem. The idea is: A company can have a great client, but you screw up once and you lose the client because you forget to always tell your client how well you are performing for them. the entire premise of the book is a company must be able to have the infrastructure in place to measure, and track how well they perform. Many are not able to do this and if you are not able to this is not something you can change over night - or even in a year. The book is full of platitudes and basic ideas. no substance.
The book details an interesting paradox: your own great performance can be the cause of losing a client. In other words, you set the bar so high that one failure can cause the client to leave. Unless you're totally overstaffed with people who do nothing but interact with the client to remind them of how great you are, there really is no feasible solution to the problem posed.