Fun as a contractor

Why can't all of my customers be like this? I sent off an an email asking about whether a particular customer might be able to finish up their acceptance testing by the end of the year, since there's a payment contingent on acceptance and I'd like that to be part of my 2004 taxable income, and they said:


I'm positive we can get that to you this year.
...
And a final note. We want to keep you happy. I'm hoping our working relationship won't end with this payment.


Gotta like that. They're the customer here, and they want to keep me happy? I hope they find lots of work that they want me to do!