Not one little problem, even after my kid poured V8 juice all down in the keys back in 1991. I am very disappointed in Korg for their support on this board. How can you make a product as awesome as the M1 and then turn your back on it. I am not sure at what price you could buy one today, but if I lost it, I probably wouldn't replace it. It is a great box, but the technology is just so much better now.
Light years appart.
Many years of faithful service. 10 The effects are fairly good for a ten year old keyboard, and they are fairly easy to use. I just want to say that I bought my M1 in around 1990. I think its strengths are the saxophone, horn, acoustic guitar and pad sounds. The organ sounds are weak.