I can't comment on customer service, but I can comment on having owned and used several BM's for a couple years.
Quality control is hit or miss with nearly every knife manufacturer, including BM. I've had horribly ground blades on a few BM's, Spyderco's, a Kershaw, a Busse, and a SOG. The grinding for the edge is one thing (you can always re-bevel or re-sharpen it yourself anyways), but the grinding for the profile of the blade is another thing entirely. The grind on my 940 and Military are literally diagonal, making the edge of the knife crooked rather than straight.
Value for the cost is a rather absurd judgment to make. There are only a very instances of a knife model that have been made by different manufacturers. IIRC BM made a few Emerson knives back in the 90's, and today they are generally thought to be of slightly higher quality; ESEE had knives made by Ontario until they broke away, and now ESEE's are considered greater quality than Ontario. In determining value of a knife that is only made by BM, the distinctions become much less clear. Yes, Spyderco or Kershaw may make a knife with similar materials at a higher or lower cost, but then you are comparing different knives to different knives. To be honest I've been completely satisfied with the majority of the BM's I own/have owned.
The 943 is a great knife, and within it's price range I think that there are few knives that can compete with it. The Sage I and II are frequently compared to the 94x series, but if you compare their volumetric measurements it becomes clear which series will win out. Various arguments may be made for ergonomics, but their refutation will lay in the fact that ergonomics are completely subjective--don't let someone else tell you whether or not a knife is ergonomic before you even get it in your hand.
Like Neuron said, you can frequently get BM's through dealers at significant discounts from MSRP.