Doubt I will buy this for a long time. I just got the upgrade to Kontakt 5 last month; I had Kontakt 4 for over 6 years before upgrading and I waited, and waited and just got it bundled in K9Ultimate. I want to explore it before confusing me with a different sampler. Given that Kontakt 5 regularly was available for $98 as an upgrade, I would not even consider ST3 unless it's upgrade price is at least as competitive in price and even if it is available at that price I will wait. Also, I want to hear what others see and hear in it and to see how stable it is. Like many here, I have waited this long, I can easily wait some more; I am just not in a hurry to get it any more. Shoot, I even waited until last week to upgrade to Ozone5 and that was for $79. But that is apples compared with oranges. Still, what I mean is that the price will really need to be competitive.
I do admit that the new ST3 GUI (as seen on MF link) does look much more readable and that feature will be welcomed. From what I gleaned over at the KVR countdown thread there will not be a free player version for a while.
I do wish IKMultimedia success with this. For now, I am happy with Kontakt 5 and I will and can wait a little longer.