Define customer service, it is actually means "provides service to the customer" it means one thing, if it is ordering dates it is another. Most companies will have decent service if you are positive and your problems small, try lodging a major complaint about performance issues, or even try to get performance statements out of some and how much service they are willing to provide is another matter.
If I have to choose between two companies and one is upfront and direct about the performance of their knives, what it can do, what you can do with it, deals with critism without personality, and has issues with shipping dates and punctuality, and another which is really fast and prompt when you are positive and friendly but is useless when you want to talk about performance then it is an easy decision to me.
Spyderco is fairly strong in both areas, Sal talks about performance readily and I have returned knives to them which worked well and Sal seeks out and addresses complaints on the forums which are not even directed to him.
-Cliff