I am, only in the sense that I stopped using Kore when NI stopped supporting it (primarily because it pissed me off so much). Never tried to use it with Mavericks/ Logic X, etc. I've just started playing with the new Kontrol software with my K9Ult (K10U on the way). 50/50 as to if I'll get the new hardware (as a keyboardist, even 61 keys is too small..why not a 76 key version??) So far, I like the organization of the new software, but there's a lot more to learn.