Personally, I don't think the Freeze function is quite there yet. Yes, the speed is improved over SX2, but I still think there is room to improve. I imagine the maintenance update (which should be here by now) may improve this and fix other bugs....who knows. I do know I recently tried the demo of Sonar 4, and their first implementation of freeze is already faster and works just fine.
I'm not anti-Cubase as I use it and love it for the most part, but Steinberg needs to start getting Cubase into better shape - and soon.