My only two repair experiences have been with spyderco.
The first one was an ATS-55 endura that I broke the tip on. I sent it to them and they sent me a new knife. I paid a total cost of $15. Turn around time was about 2 weeks.
The second one was a stainless left-hand spyderedge police model. I had received it in a trade for my emerson cqc-7 which I hated. The tip had been damaged by the original owner, and the action was very stiff. There was some rust on the stainless handle both on the outside and inside. I sent it to Spyderco and they reground the tip, sharpened the serrations, smoothed out the action and polished the handle and blade. I again paid $15 for this one. Turn around time was nearly a month.
I have a third one, which is a military s30v with g10 handles that a co-worker broke the tip on. I'll let you know what happens with it.
A coworker sent his spyderfly which some fool was flipping around and dropped to spyderco. They charged him $25 and replaced the damaged blade, the broken spring in the latch, and the broken pivot in the latch. Turn around time for him was nearly 3 months. This seemed kind of excessive to me.
Based on my experiences, I would wholeheartedly recommend spyderco knives to anyone.