I fully agree with the sentiments about working with John. He is very flexible and consistent and always keeps you informed of progress. I think that the same can be said for a number of the makers around here also. Every time I've worked with Bryan Breeden it has been a very positive experience that involved a number of e-mails to clarify instructions and updates as to progress and expected ship dates. Both John and Bryan are incredibly flexible at accepting design modifications and turning user generated drawings into real and workable products. Judging from the posts on W&SS I suspect that dealing with Christoff, DP-knives, David Farmer and Gossman are the same. I'd include Andy here also, but he uses a different business model (he makes his design and sells it rather than accepting custom orders).
I've come to the point now where I strongly prefer to buy products where the maker or company representative is active on one of the forums and will respond to users of their products. For production companies, this is a tall order to fill. Yet many of large companies actually do this (Buck, Spyderco, Ratcutlery, Bark River) to name a few.