3 Seems there has been lots of troubles with disk drives. Keep at least 2 copies of any valuable sounds. Crashes now and then - after restarting the machine, everything's fine again. Power supply broke down. Too expensive to replace.
Nothing lasts for ever.
I used it for 6 years and was happy with its possibilities. If it wasn't a real bargain, I wouldn't buy it again now. A good soundcard might be a better investment. I have an html formated manual for anyone in need for it. I also don't know how to copy the later OS it because it is AKAI format and I run PCs.