At the store where I work, we've installed both units. Mark Burgett, whose family owns Pianodisc, lives here in San Diego, and used to do a lot of our installs. He is the one who trains the new installers, and is the technical advisor for Pianodisc. When we used to sell the Pianodisc, there were many complaints, and service calls were referred to him, which he used to do gladly. Since we have been installing the QRS system, we've had almost no callbacks or problems. I don't install the systems myself, so I can't comment on any problems, but we like the QRS better. Paul McCloud
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