As a long time Bryston customer, I've had a couple of occasions to exercise the warranty.
I had the bridged/stereo switch on the back of a 10 year old 4B-ST go on me, and the silk-screened lettering on a 12 year old 25BP started to come off -- making it look somewhat "tired". In the first case, Bryston replaced the switch and re-bench tested the amp -- still as good as new, spec wise. For the BP25, they put on a brand-new face-plate for me. (Mike Pickett said the lettering shouldn't come off for anything short of an angle grinder.)
In both cases the service was extremely professional, thorough and prompt, and the people at Bryston were very nice about it.
I always recommend Bryston to friends and colleagues looking to buy quality gear. Not only are the products great, and deliver great value, but Bryston also stands behind them completely.