Obviously I can't speak for others here, or the vendors, but to me feedback is useful information for all involved. The vendor can try to improve their service when a problem is identified, and the buyer can avoid potential problems others may have had. Of course, we won't all have the same experience and personal perceptions play a role, but I think the info can be useful if not taken out of context. As for myself, I've used most of the various vendors over the years on different projects, always comparing price, quality and service. I'm sure you can find someone, somewhere, who has had a good experience, and someone with a bad experience, when using any vendor. The few problems I've had (and there have been only a few), the vendors involved, when the problem was brought to their attention, did the right thing and I continue to use them. They way I see it, parts suppliers are run by people, just like us, and as people we all make mistakes at times, but from my experience when a valid mistake occurs and is properly discussed and explained, a reasonable resolution can usually be reached.
Jeff
68SS in TX