My experience buying from this dealer was very positive:
I got on the Shuffler craze about 3 weeks ago and ordered the white CF iteration (not a slip joint type of guy, but what the heck as you gotta have some!).
If any gripe at all by just being picky, the knife came a tad off center but that is more on the Italian production knife than the dealer. Very impressed with their payment receipt and shipping notification / tracking platform. The package was very nicely shrink-wrapped and everything was very professional and very clean.
As a shipper of other products, I have a critical sense for how other people present, package and ship products to their customers and regarding my small transaction I could not really find any fault with this dealer and his process. Based on the care in packaging and also their platform for payment and shipping notification, I can not fathom that CK could be amateurish when it comes to returns / RMA / customer service. In fact I just quickly checked their website and everything is laid out very efficiently.