Got one of these when they first came out, and had a lot of fun with it.  Let it go after about 2 years since it felt limited and editing was not natural with this puppy.  It could be that I'm just not as familiar with Korg language and OS but for me this little synth was cryptic and not so exciting as i had thought it would be.  I used it and enjoyed it fully, but always wanted to go further than this puppy would take me.  Still, i want to mention that i did enjoy playing with this small keyboard quite a bit, and was tempted to buy the Rackmount version (MS2000) to see if it would be a deeper machine.