Since I love my B&K stuff, I hate to say B&K has provided NO customer service (at least bad would be something). I have tried ad nauseum to email regarding upgrades to my REF 10 pre-pro and have receive no reply. I'm sure my dealer would help, but if I wanted to leave home, I would be on the net. For best, the majority have been good. If you shop on the net, like I do, establish an email relationship prior to buying. If they don't respond well to info and questions, you can caount on poor after the fact service.
Best and Worst customer service?
My vote goes for Sonic Frontiers, as Best! I was contacted within an hours, after e-mailing a question. Wery friendly and helpfull!(they can count me-in on the next purchase) Thw Worst? Linn audio! It's been over a month since i submited a Q! I am stll e-mailing the question...i am sort of amused by now!