I'm on the trial right now and as it stands, I am not convinced this program is as responsive as I like. There seems to be a delay when using the timeline and mouse clicks. The pointer tool (V) seems to be a combo of a pointer/trim tool and it's annoying when trying to grab small clips and move around video layers.
Editing R3d native is awesome, maybe that's causing the lag?
Mac Pro 8 core 2.93, 48 GB ram, GTX 285 card with 1GB Ram.