Well, besides talking from experience, I owned many KORG keyboards from the I-3 and on, which made about 80 percent of my setup,the particular design was a faulty design,I have read a few complaints on the KORG forums and a lot of people who do not really participate in forums have complaints, now the M3,M50 and on we don't know what the outcome will be, too soon to know, I never had a problem with a ROLAND or YAMAHA, I have opened up many of the KORG keyboards and repaired many in the past.