I've bought many things from KSF and have always been fully satisfied. I've also bought from Workwear, not cutlery, but other items. They are both great dealers to work with. KSF will get you the product cheaper, particularly given the nearly at par currencies of the moment. Workwear will get you the product out faster because he is not subject to the vagaries of customs which can be anywhere from 0 extra days to 3 weeks.
So I use the rule, do I want it really fast? Then I'd go for Workwear and eat the slightly higher cost. Do I want it on the cheap, then I'd go with KSF. Of course there are many other U.S. dealers that ship to Canada and are wise enough to do so by not using UPS. Always specifiy U.S. postal service, but the unfortunate closeness in terms of acronyms can make this easily confused. Last little bit to consider, is if you are having order mix-up issues - and this happens even with the best of folks - it is much easier to deal with this within country instead of having to go through 3 border crossings.