I am a service tech for Yamaha Disklaviers.  Of the 40 that I have sold,
the only one that has given any problems is the one in a casino.  That
problem has been careless people with their drinks.  Cleaning sugar-
flavored drinks out of it has been the only problem.  It plays daily for
up to 18 hours a day and has performed without any failure due to its
mechanical system for three years.

I also serviced one that had a mouse eat the wiring.  Overall they are
the best in my opinion.  The pianos are excellent and the mechanics are
very well thought out.

Don Teach