I went from 6 years with Silvia and Rocky, upgraded to a VBM DS and Rocky for about 8 months, and now have nearly a year with VBM DS and Mazer Kony. I do not at all regret selling the Rocky. Yes, it worked but as soon as I stepped up to a high-quality, stepless grinder I noticed the improvement and control. If you have the Rocky already, then it will work for now until you can afford to step up. If not, look elsewhere for a better grinder. And while I would not recommend the Kony to anyone but the highly insane (like myself) I really like the Mazzer offerings for a lot of reasons, but there are plenty of great grinders out there.