I've never liked Yamaha synths or their old drum machines, although I love everything else they produce. I've owned their speakers in the past and currently use their MG10XU mixer. Quality stuff. Don't like their particular menu-diving on the synths, or their sound. My Kurzweil has an FM engine in it, also, so I can directly load old 1980s Yamaha DX7 patches into it and it's identical. I use that classic DX7 electric piano that was in nearly every 1980s slow song all the time (think Whitney's 'Greatest Love' intro). I have a MotifRack XS boxed in my garage that has maybe 8 hours on it that I need to sell. Bought it a few years ago and hated the sounds. It's not that they are bad, they just don't do anything for me. Typical Yammy sound.years ago- dear gawd! This is going back years. At that time I bought one of the first ones- In it's day- it cost me hundreds... like 6- 7 hundred.... it was heavy- and considered the instrument of its its day.. casio? It was a great instrument... simple- but in my opinion? I prefer casio compared to yamaha? i think casio has a much more sexy sound! deeper and much better! it's sitting in my closet- middle c- f-up..