From what I've been told by Antoine the Mac/PC versions are the same. I agree with cckens observations though. I also think familiarity and time spent within the interface plays against the "sluggishness". I've done a number of shorts for demo CDs with Carrara 3 and felt pretty darn comfortable with it. Could possibly boil down to personal perspective. One man's Porche is another's Ford...if ya know what I mean. Kat