Sometimes it's hard to be nice to everyone, all the time.
Some people just don't get along, and it takes a lot of self-control to keep treating them as well as any other customer. In fact, it may even feel downright impossible.
However, these difficult customers can also turn into your best advocates. When demanding people are satisfied with what you offer, they will stick with your product or service for a long time because they know how hard it is to find a company that can perform to their standard of quality.
Over time, we see the benefits of this policy. People change jobs, and they will bring AceProject into their new company. And now all the energy we spent on making the original client happy pays off: the new client is already sold, and we have someone on the inside who can be an advocate for AceProject.