My recommendation is to make sure you see the exact knife you are going to buy before you buy it. I wish I could say I had a great experience with Case's customer service/warranty, but it was just so-so.
I purchased a Case/Tony Bose Eureka Jack in ebony. When it arrived, I was pretty displeased with the ebony (it looked a whole lot better on the website). It had a lot of gray streaking which I honestly found unacceptable on such a highly priced knife. I sent them an e-mail, along with a picture, explaining that I wasn't very satisfied with the covers and that the wharncliffe blade sat just a little bit too high (visible in the picture), making the main blade very hard to open (it has a rather strong pull). I received an email back saying the covers should not look the way they do and I was promptly sent a pre-paid shipping label.
After about three months I received a call saying that the knife met their standards. When I asked about the gray streaking, I was told that sometimes the ebony doesn't take the dye very well and it causes streaking. I then gave my opinion that a knife costing $400 - $500
should not have ebony covers that need to be dyed. I also let them know that none of the several $100 - $300 knives I own with ebony covers are dyed, and none of them show streaking like the Eureka Jack. From there it was escalated to the head of the repair department. He called me back and said he had done some research and that the covers were in fact, not dyed. He then let me know that the streaking is a natural part of ebony wood and that he did some further research and agreed that jet black ebony is more in demand and is considered a more premium product. I let him know that I feel a $400 - $500 slipjoint is a premium product and that the Case/Tony Bose line is among their highest end knives. I also let them know that Boker, GEC, and a plethora of others are able to use jet black ebony on their knives that range in the $100 - $200 range so I didn't really understand why Case couldn't on a knife that cost two and a half to five times as much. I was then told that there was just nothing they could do for me and the knife was shipped back after being in their possession for three months.
Granted, I could just be an extra picky customer... But I really don't think these covers are acceptable on a knife priced as high as this.